Add safety check

.dist/channel.js

@@ -798,6 +798,9 @@ class Channel {
             return;
         this.infinitefocus = true;
         const messages = document.getElementById("channelw");
+        for (const thing of messages.getElementsByClassName("messagecontainer")) {
+            thing.remove();
+        }
         const loading = document.getElementById("loadingdiv");
         const removetitle = document.getElementById("removetitle");
         //messages.innerHTML="";