fix: align member meta default avatars

server/topic.go

@@ -3374,7 +3374,11 @@ func (t *Topic) replyGetSub(sess *Session, asUid types.Uid, authLevel auth.Level
 			// Returning public and private only if they have changed since ifModified
 			if sendPubPriv {
 				// 'sub' has nil 'public'/'trusted' in P2P topics which is OK.
-				mts.Public = sub.GetPublic()
+				if t.cat == types.TopicCatGrp {
+					mts.Public = publicWithDefaultUserAvatar(sub.GetPublic(), uid.UserId())
+				} else {
+					mts.Public = sub.GetPublic()
+				}
 				mts.Trusted = sub.GetTrusted()
 				// Reporting 'private' only if it's user's own subscription.
 				if uid == asUid {