diff --git a/src/addons/blog/pages/entries/entries.html b/src/addons/blog/pages/entries/entries.html
index ee8584a08..67120df9f 100644
--- a/src/addons/blog/pages/entries/entries.html
+++ b/src/addons/blog/pages/entries/entries.html
@@ -30,7 +30,7 @@
                         <div class="flex-row ion-justify-content-between ion-align-items-center">
                             <h2>
                                 <core-format-text [text]="entry.subject" [contextLevel]="contextLevel"
-                                    [contextInstanceId]="contextInstanceId" />
+                                    [contextInstanceId]="contextInstanceId" [courseId]="entry.courseid" />
                             </h2>
                             <ion-note class="ion-text-end">
                                 {{ 'addon.blog.' + entry.publishTranslated! | translate}}
@@ -47,8 +47,8 @@
                 <ion-card-content>
                     <ion-item class="ion-text-wrap">
                         <ion-label>
-                            <core-format-text [text]="entry.summary" [component]="this.component" [componentId]="entry.id"
-                                [contextLevel]="contextLevel" [contextInstanceId]="contextInstanceId" />
+                            <core-format-text [text]="entry.summary" [component]="component" [componentId]="entry.id"
+                                [contextLevel]="contextLevel" [contextInstanceId]="contextInstanceId" [courseId]="entry.courseid" />
                         </ion-label>
                     </ion-item>
                     <ion-item class="ion-text-wrap" *ngIf="tagsEnabled && entry.tags && entry.tags!.length > 0">
@@ -57,10 +57,9 @@
                             <core-tag-list [tags]="entry.tags" />
                         </ion-label>
                     </ion-item>
-                    <core-comments *ngIf="commentsEnabled" [component]="this.component" [itemId]="entry.id" area="format_blog"
-                        [instanceId]="entry.userid" contextLevel="user" [showItem]="true" />
-                    <core-file *ngFor="let file of entry.attachmentfiles" [file]="file" [component]="this.component"
-                        [componentId]="entry.id" />
+                    <core-comments *ngIf="commentsEnabled" [component]="component" [itemId]="entry.id" area="format_blog"
+                        [instanceId]="entry.userid" contextLevel="user" [showItem]="true" [courseId]="entry.courseid" />
+                    <core-file *ngFor="let file of entry.attachmentfiles" [file]="file" [component]="component" [componentId]="entry.id" />
                     <ion-item *ngIf="entry.uniquehash" [href]="entry.uniquehash" core-link [detail]="true">
                         <ion-label>{{ 'addon.blog.linktooriginalentry' | translate }}</ion-label>
                     </ion-item>
diff --git a/src/core/features/block/components/pre-rendered-block/pre-rendered-block.ts b/src/core/features/block/components/pre-rendered-block/pre-rendered-block.ts
index fda6ef0a7..bb7931eac 100644
--- a/src/core/features/block/components/pre-rendered-block/pre-rendered-block.ts
+++ b/src/core/features/block/components/pre-rendered-block/pre-rendered-block.ts
@@ -36,13 +36,11 @@ export class CoreBlockPreRenderedComponent extends CoreBlockBaseComponent implem
      * @inheritdoc
      */
     async ngOnInit(): Promise<void> {
-        await super.ngOnInit();
-
         this.courseId = this.contextLevel == 'course' ? this.instanceId : undefined;
-
         this.fetchContentDefaultError = 'Error getting ' + this.block.contents?.title + ' data.';
-
         this.id = `block-${this.block.instanceid}`;
+
+        await super.ngOnInit();
     }
 
 }
diff --git a/src/core/features/filter/services/filter-helper.ts b/src/core/features/filter/services/filter-helper.ts
index 5fe6845af..249cf87f0 100644
--- a/src/core/features/filter/services/filter-helper.ts
+++ b/src/core/features/filter/services/filter-helper.ts
@@ -69,32 +69,6 @@ export class CoreFilterHelperProvider {
         });
     }
 
-    /**
-     * Get the contexts of all blocks in a course.
-     *
-     * @param courseId Course ID.
-     * @param siteId Site ID. If not defined, current site.
-     * @returns Promise resolved with the contexts.
-     */
-    async getBlocksContexts(courseId: number, siteId?: string): Promise<CoreFiltersGetAvailableInContextWSParamContext[]> {
-        // Use stale while revalidate, but always use the first value. If data is updated it will be stored in DB.
-        const blocks = await firstValueFrom(CoreCourse.getCourseBlocksObservable(courseId, {
-            readingStrategy: CoreSitesReadingStrategy.STALE_WHILE_REVALIDATE,
-            siteId,
-        }));
-
-        const contexts: CoreFiltersGetAvailableInContextWSParamContext[] = [];
-
-        blocks.forEach((block) => {
-            contexts.push({
-                contextlevel: 'block',
-                instanceid: block.instanceid,
-            });
-        });
-
-        return contexts;
-    }
-
     /**
      * Get some filters from memory cache. If not in cache, get them and store them in cache.
      *
@@ -199,10 +173,14 @@ export class CoreFilterHelperProvider {
     async getFilters(
         contextLevel: string,
         instanceId: number,
-        options?: CoreFilterFormatTextOptions,
+        options: CoreFilterFormatTextOptions = {},
         siteId?: string,
     ): Promise<CoreFilterFilter[]> {
-        options = options || {};
+        // Check the right context to use.
+        const newContext = CoreFilter.convertContext(contextLevel, instanceId, { courseId: options.courseId });
+        contextLevel = newContext.contextLevel;
+        instanceId = newContext.instanceId;
+
         options.contextLevel = contextLevel;
         options.instanceId = instanceId;
         options.filter = false;
@@ -246,11 +224,6 @@ export class CoreFilterHelperProvider {
                 // If enrolled, get all enrolled courses filters with a single call to decrease number of WS calls.
                 const getFilters = () => this.getCourseContexts(instanceId, siteId);
 
-                return await this.getCacheableFilters(contextLevel, instanceId, getFilters, options, site);
-            } else if (contextLevel == 'block' && courseId && CoreBlockHelper.canGetCourseBlocks(site)) {
-                // Get all the course blocks filters with a single call to decrease number of WS calls.
-                const getFilters = () => this.getBlocksContexts(courseId, siteId);
-
                 return await this.getCacheableFilters(contextLevel, instanceId, getFilters, options, site);
             }
 
diff --git a/src/core/features/filter/services/filter.ts b/src/core/features/filter/services/filter.ts
index b2eb8c3ba..9f75d7fad 100644
--- a/src/core/features/filter/services/filter.ts
+++ b/src/core/features/filter/services/filter.ts
@@ -24,6 +24,7 @@ import { makeSingleton } from '@singletons';
 import { CoreEvents, CoreEventSiteData } from '@singletons/events';
 import { CoreLogger } from '@singletons/logger';
 import { CoreSiteWSPreSets } from '@classes/sites/authenticated-site';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Service to provide filter functionalities.
@@ -162,6 +163,29 @@ export class CoreFilterProvider {
         return classified;
     }
 
+    /**
+     * Given a context level and instance ID, return the proper context to use.
+     *
+     * @param contextLevel The context level.
+     * @param instanceId Instance ID related to the context.
+     * @param options Options.
+     * @returns Context to use.
+     */
+    convertContext(
+        contextLevel: string,
+        instanceId: number,
+        options: {courseId?: number} = {},
+    ): {contextLevel: string; instanceId: number} {
+        if (contextLevel === ContextLevel.BLOCK || contextLevel === ContextLevel.USER) {
+            // Blocks and users cannot have specific filters, use the parent context instead.
+            return options.courseId ?
+                { contextLevel: ContextLevel.COURSE, instanceId: options.courseId } :
+                { contextLevel: ContextLevel.SYSTEM, instanceId: 0 };
+        }
+
+        return { contextLevel, instanceId };
+    }
+
     /**
      * Given some HTML code, this function returns the text as safe HTML.
      *
diff --git a/src/core/features/user/pages/about/about.html b/src/core/features/user/pages/about/about.html
index e7b7c6638..6617eae5d 100644
--- a/src/core/features/user/pages/about/about.html
+++ b/src/core/features/user/pages/about/about.html
@@ -29,7 +29,8 @@
             <ion-item class="ion-text-wrap" *ngIf="user.description" lines="full">
                 <ion-label>
                     <p>
-                        <core-format-text [text]="user.description" contextLevel="user" [contextInstanceId]="user.id" />
+                        <core-format-text [text]="user.description" contextLevel="user" [contextInstanceId]="user.id"
+                            [courseId]="courseId" />
                     </p>
                 </ion-label>
             </ion-item>