diff --git a/lib/pangea/course_chats/course_chats_page.dart b/lib/pangea/course_chats/course_chats_page.dart
index 664b57ed7..3baab1d07 100644
--- a/lib/pangea/course_chats/course_chats_page.dart
+++ b/lib/pangea/course_chats/course_chats_page.dart
@@ -143,6 +143,14 @@ class CourseChatsController extends State<CourseChats>
         continue;
       }
 
+      // If any user has archived the activity, don't show it.
+      // It's possible for users to finish an activity and then for some of the
+      // users to leave, but if the activity was archived by anyone, that means
+      // it was full at some point.
+      if (summary.activityRoles.roles.values.any((role) => role.isArchived)) {
+        continue;
+      }
+
       sessionsMap[activity] ??= [];
       sessionsMap[activity]!.add(
         ExtendedSpaceRoomsChunk(
diff --git a/pubspec.yaml b/pubspec.yaml
index 042d69637..3a069a75b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -6,7 +6,7 @@ description: Learn a language while texting your friends.
 # Pangea#
 publish_to: none
 # On version bump also increase the build number for F-Droid
-version: 4.1.15+2
+version: 4.1.15+3
 
 environment:
   sdk: ">=3.0.0 <4.0.0"