check is grp msg or not.

src/WW.js

 
-import { makeMsg, MESSAGE_TYPE, typeOfMsg } from './encGrooupMsg.js';
+import { isEncGrpMsg, makeMsg, MESSAGE_TYPE, typeOfMsg } from './encGrooupMsg.js';
 import { Observable } from 'rxjs';
 
 
@@ -123,6 +123,10 @@ export class WW extends Observable {
   // status of WW will map to local variables.
   #monitor() {
     this.subscribe(msg => {
+
+      if (!isEncGrpMsg(msg))
+        return;
+
       switch (typeOfMsg(msg)) {
         case MESSAGE_TYPE.INIT:
           this.#remoteInited = true;