diff --git a/src/addons/block/myoverview/components/myoverview/addon-block-myoverview.html b/src/addons/block/myoverview/components/myoverview/addon-block-myoverview.html
index 1c55aafb3..8852c7a00 100644
--- a/src/addons/block/myoverview/components/myoverview/addon-block-myoverview.html
+++ b/src/addons/block/myoverview/components/myoverview/addon-block-myoverview.html
@@ -71,7 +71,7 @@
         </ion-col>
         <ion-col size="auto" *ngIf="sort.enabled">
             <core-combobox [label]="'core.sortby' | translate" [selection]="sort.selected" (onChange)="sortCourses($event)"
-                icon="fas-arrow-down-short-wide">
+                icon="fas-arrow-down-short-wide" class="no-border">
                 <ion-select-option class="ion-text-wrap" value="fullname">
                     {{'addon.block_myoverview.title' | translate}}
                 </ion-select-option>
diff --git a/src/addons/block/myoverview/components/myoverview/myoverview.scss b/src/addons/block/myoverview/components/myoverview/myoverview.scss
index 9592ab859..563fadfbd 100644
--- a/src/addons/block/myoverview/components/myoverview/myoverview.scss
+++ b/src/addons/block/myoverview/components/myoverview/myoverview.scss
@@ -10,24 +10,19 @@
         }
 
         ion-button,
-        core-combobox ::ng-deep ion-button {
-            --border-width: 0;
+        core-combobox ::ng-deep ion-select {
             --a11y-min-target-size: 40px;
             margin: 0;
+        }
+
+        ion-button {
+            --border-width: 0;
 
-            .select-icon {
-                display: none;
-            }
             ion-icon {
                 font-size: 20px;
             }
         }
 
-        core-combobox ::ng-deep ion-select {
-            margin: 0;
-            --a11y-min-target-size: 40px;
-        }
-
         ion-searchbar {
             padding: 0;
             --height: 40px;
diff --git a/src/addons/block/timeline/components/timeline/addon-block-timeline.html b/src/addons/block/timeline/components/timeline/addon-block-timeline.html
index 4aca795d0..0b7d03d0d 100644
--- a/src/addons/block/timeline/components/timeline/addon-block-timeline.html
+++ b/src/addons/block/timeline/components/timeline/addon-block-timeline.html
@@ -36,7 +36,7 @@
         </ion-col>
         <ion-col size="auto">
             <core-combobox [label]="'core.sortby' | translate" [formControl]="sort" (onChange)="sortChanged($event)"
-                icon="fas-arrow-down-short-wide">
+                icon="fas-arrow-down-short-wide" class="no-border">
                 <ion-select-option *ngFor="let option of sortOptions" class="ion-text-wrap" [value]="option.value">
                     {{ option.name | translate }}
                 </ion-select-option>
diff --git a/src/addons/mod/forum/tests/behat/snapshots/test-basic-usage-of-forum-activity-in-app-reply-a-post_9.png b/src/addons/mod/forum/tests/behat/snapshots/test-basic-usage-of-forum-activity-in-app-reply-a-post_9.png
index 87aa8ca9c..e801c2db6 100644
Binary files a/src/addons/mod/forum/tests/behat/snapshots/test-basic-usage-of-forum-activity-in-app-reply-a-post_9.png and b/src/addons/mod/forum/tests/behat/snapshots/test-basic-usage-of-forum-activity-in-app-reply-a-post_9.png differ
diff --git a/src/core/components/combobox/combobox.scss b/src/core/components/combobox/combobox.scss
index 80c9379ad..9e61dfed6 100644
--- a/src/core/components/combobox/combobox.scss
+++ b/src/core/components/combobox/combobox.scss
@@ -5,30 +5,94 @@
     display: block;
     @include margin-horizontal(var(--ion-safe-area-left), var(--ion-safe-area-right));
 
+    &.no-border {
+        --core-combobox-border-width: 0px;
+
+        ion-select.combobox-icon-only {
+            --padding-start: 8px;
+
+            &::part(icon) {
+                display: none;
+            }
+
+            &::part(label) {
+                position: static;
+            }
+
+            ion-icon {
+                margin: var(--icon-margin);
+                font-size: 20px;
+            }
+        }
+    }
+
+
     ion-select,
     ion-button {
         --icon-margin: 0 4px;
-        --background: var(--core-combobox-background);
-        --background-hover: black;
-        --background-activated: black;
-        --background-focused: black;
-        --background-hover-opacity: .04;
 
+        --background: var(--core-combobox-background);
+
+        --border-color: var(--core-combobox-border-color);
+        --border-style: solid;
+        --border-width: var(--core-combobox-border-width);
+        --border-radius: var(--core-combobox-radius);
+
+        --box-shadow: var(--core-combobox-box-shadow);
+
+        --padding-start: 16px;
+        --padding-end: 8px;
+        --padding-top: 8px;
+        --padding-bottom: 8px;
+
+        background: var(--background);
+        color: var(--color);
+        text-overflow: ellipsis;
+        white-space: nowrap;
+        min-height: var(--a11y-min-target-size);
+        overflow: hidden;
+        box-shadow: var(--box-shadow);
+
+        &:focus,
+        &:focus-within {
+            @include core-focus-style();
+        }
+    }
+
+    ion-select {
+        border-color: var(--border-color);
+        border-style: var(--border-style);
+        border-width: var(--border-width);
+        border-radius: var(--core-combobox-radius);
+        margin: 8px;
+
+        &.combobox-icon-only {
+            &::part(text) {
+                display: none;
+            }
+        }
+
+        &::part(label) {
+            position: absolute;
+            margin-inline: 0px;
+        }
+
+        &::part(icon) {
+            margin: var(--icon-margin);
+            opacity: 1;
+        }
+    }
+
+    ion-button {
         --color: var(--core-combobox-color);
         --color-activated: var(--core-combobox-color);
         --color-focused: currentcolor;
         --color-hover: currentcolor;
 
-        --border-color: var(--core-combobox-border-color);
-        --border-style: solid;
-        --border-width: var(--core-combobox-border-width);
-        --border-radius: var(--radius-xs);
-
-        --box-shadow: var(--core-combobox-box-shadow);
-
-        --padding-top: 8px;
-        --padding-end: 8px;
-        --padding-bottom: 8px;
+        --background-hover: black;
+        --background-activated: black;
+        --background-focused: black;
+        --background-hover-opacity: .04;
 
         &.md {
             --background-activated-opacity: 0;
@@ -39,97 +103,36 @@
             --background-activated-opacity: .12;
             --background-focused-opacity: .15;
         }
-    }
 
-    ion-button {
-        --padding-start: 8px;
-    }
-
-    ion-select {
-        --padding-start: 16px;
-    }
-}
-
-ion-select,
-ion-button {
-    background: var(--background);
-    color: var(--color);
-    text-overflow: ellipsis;
-    white-space: nowrap;
-    min-height: var(--a11y-min-target-size);
-    overflow: hidden;
-    box-shadow: var(--box-shadow);
-
-    &:focus,
-    &:focus-within {
-        @include core-focus-style();
-    }
-}
-
-ion-select {
-    border-color: var(--border-color);
-    border-style: var(--border-style);
-    border-width: var(--border-width);
-    border-radius: var(--core-combobox-radius);
-    margin: 8px;
-
-    &::part(icon) {
-        margin: var(--icon-margin);
-        opacity: 1;
-    }
-
-    &::after {
-        @include button-state();
-        transition: var(--transition);
-        z-index: -1;
-    }
-
-    &:hover::after {
-        color: var(--color-hover);
-        background: var(--background-hover);
-        opacity: var(--background-hover-opacity);
-    }
-
-    &:focus::after,
-    &:focus-within::after {
-        color: var(--color-focused);
-        background: var(--background-focused);
-        opacity: var(--background-focused-opacity);
-    }
-
-    &[hidden] {
-        display: none !important;
-    }
-}
-
-ion-button {
-    border-radius: var(--core-combobox-radius);
-    margin: 4px 8px;
-
-    flex: 1;
-
-    &::part(native) {
-        text-transform: none;
-        font-weight: 400;
-        font-size: 16px;
-        line-height: 20px;
         border-radius: var(--core-combobox-radius);
+        margin: 4px 8px;
+
+        flex: 1;
+
+        &::part(native) {
+            text-transform: none;
+            font-weight: 400;
+            font-size: 16px;
+            line-height: 20px;
+            border-radius: var(--core-combobox-radius);
+        }
+
+        .select-text {
+            @include margin-horizontal(null, auto);
+            overflow: hidden;
+            text-overflow: ellipsis;
+        }
+        .sr-only {
+            @include sr-only();
+        }
+
+        &.ion-activated {
+            --color: var(--color-activated);
+        }
+
+        ion-icon {
+            margin: var(--icon-margin);
+        }
     }
 
-    .select-text {
-        @include margin-horizontal(null, auto);
-        overflow: hidden;
-        text-overflow: ellipsis;
-    }
-    .sr-only {
-        @include sr-only();
-    }
-
-    &.ion-activated {
-        --color: var(--color-activated);
-    }
-
-    ion-icon {
-        margin: var(--icon-margin);
-    }
 }
diff --git a/src/core/components/combobox/combobox.ts b/src/core/components/combobox/combobox.ts
index 97414ae21..ddf7e75e8 100644
--- a/src/core/components/combobox/combobox.ts
+++ b/src/core/components/combobox/combobox.ts
@@ -12,11 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, EventEmitter, Input, Output, ViewChild } from '@angular/core';
+import { Component, EventEmitter, Input, Output } from '@angular/core';
 import { Translate } from '@singletons';
 import { ModalOptions } from '@ionic/core';
 import { CoreDomUtils } from '@services/utils/dom';
-import { IonSelect } from '@ionic/angular';
 import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
 
 /**
@@ -51,8 +50,6 @@ import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
 })
 export class CoreComboboxComponent implements ControlValueAccessor {
 
-    @ViewChild(IonSelect) select?: IonSelect;
-
     @Input() interface: 'popover' | 'modal' = 'popover';
     @Input() label = Translate.instant('core.show'); // Aria label.
     @Input() disabled = false;
@@ -112,30 +109,25 @@ export class CoreComboboxComponent implements ControlValueAccessor {
     /**
      * Shows combobox modal.
      *
-     * @param event Event.
      * @returns Promise resolved when done.
      */
-    async openSelect(event?: UIEvent): Promise<void> {
+    async openModal(): Promise<void> {
         this.touch();
 
-        if (this.interface === 'modal') {
-            if (this.expanded || !this.modalOptions) {
-                return;
-            }
-            this.expanded = true;
+        if (this.expanded || !this.modalOptions) {
+            return;
+        }
+        this.expanded = true;
 
-            if (this.listboxId) {
-                this.modalOptions.id = this.listboxId;
-            }
+        if (this.listboxId) {
+            this.modalOptions.id = this.listboxId;
+        }
 
-            const data = await CoreDomUtils.openModal(this.modalOptions);
-            this.expanded = false;
+        const data = await CoreDomUtils.openModal(this.modalOptions);
+        this.expanded = false;
 
-            if (data) {
-                this.onValueChanged(data);
-            }
-        } else if (this.select) {
-            this.select.open(event);
+        if (data) {
+            this.onValueChanged(data);
         }
     }
 
diff --git a/src/core/components/combobox/core-combobox.html b/src/core/components/combobox/core-combobox.html
index 8d0868bc5..212de4608 100644
--- a/src/core/components/combobox/core-combobox.html
+++ b/src/core/components/combobox/core-combobox.html
@@ -1,18 +1,17 @@
-<ion-button (click)="openSelect($event)" *ngIf="interface !== 'modal' && icon" [disabled]="disabled">
-    <ion-icon [name]="icon" [attr.aria-label]="label" slot="start" />
-    <div class="select-icon" role="presentation" aria-hidden="true">
-        <div class="select-icon-inner"></div>
-    </div>
-</ion-button>
 <ion-select *ngIf="interface !== 'modal'" class="ion-text-start" [(ngModel)]="selection" (ngModelChange)="onValueChanged(selection)"
-    [interface]="interface" [attr.aria-label]="label" [disabled]="disabled" [hidden]="!!icon">
+    [interface]="interface" [disabled]="disabled" [class.combobox-icon-only]="icon" [interfaceOptions]="{alignment: 'start', arrow: false}">
+    <div slot="label">
+        <span class="sr-only" *ngIf="label">{{ label }}</span>
+        <ion-icon *ngIf="icon" [name]="icon" aria-hidden="true" />
+    </div>
+
     <ng-content></ng-content>
 </ion-select>
 
 <ion-button *ngIf="interface === 'modal'" aria-haspopup="listbox" [attr.aria-controls]="listboxId" [attr.aria-owns]="listboxId"
-    [attr.aria-expanded]="expanded" (click)="openSelect()" [disabled]="disabled" expand="block" role="combobox">
+    [attr.aria-expanded]="expanded" (click)="openModal()" [disabled]="disabled" expand="block" role="combobox">
     <ion-icon *ngIf="icon" [name]="icon" slot="start" aria-hidden="true" />
-    <span class="sr-only" *ngIf="label">{{ label }}:</span>
+    <span class="sr-only" *ngIf="label">{{ label }},</span>
     <div class="select-text">
         <slot name="text">{{selection}}</slot>
     </div>
diff --git a/src/theme/theme.base.scss b/src/theme/theme.base.scss
index 37c3e2adf..a1543e5b2 100644
--- a/src/theme/theme.base.scss
+++ b/src/theme/theme.base.scss
@@ -1027,7 +1027,6 @@ input[type=radio],
     --border-width: 2px;
     --outer-border-width: 2px;
     --border-style: solid;
-    --inner-border-radius: 50%;
     --size: 20px;
 
     &:not(.ion-color) {
@@ -1045,10 +1044,10 @@ input[type=radio],
 }
 
 .ios ion-radio {
-    width: var(--size);
-    height: var(--size);
-
     &::part(container) {
+        width: var(--size);
+        height: var(--size);
+
         margin: 0px;
         border-radius: var(--border-radius);
         border-width: var(--outer-border-width);
@@ -1155,6 +1154,13 @@ ion-select {
 }
 
 ion-select-popover {
+    ion-list ion-radio-group ion-item.select-interface-option ion-radio.hydrated::part(container) {
+        opacity: 1;
+    }
+
+    ion-item {
+        font-size: 14px;
+    }
     ion-item.core-select-option-border-bottom {
         border-bottom: 1px solid var(--stroke);
     }
@@ -1645,6 +1651,7 @@ ion-item.item {
 // Change default outline.
 :focus-visible {
     @include core-focus-style();
+    border-radius: inherit;
     outline: none;
 }