Update client-channel.js

Author: benhatsor

worker/client-channel.js

@@ -202,7 +202,8 @@ function handleFetchRequest(request, event) {
 
       let clientId = event.clientId;
 
-      const [url, parentClientId] = request.url.split('?');
+      let [url, parentClientId] = request.url.split('?');
+      parentClientId = parentClientId.slice(0, -('/'.length));
 
       const liveFramePath = INTERNAL_PATHS.relLivePath;