fix bug where mailbox would enable after setting channel

dist/index.js

@@ -1155,6 +1155,7 @@
     UDN.deleteMailbox(mailboxId.value);
   }
   function updateMailbox() {
+    if (isMailboxActive.value == false) return;
     deleteMailbox();
     setTimeout(() => requestMailbox(), 10);
   }

src/Model/model.ts

@@ -112,6 +112,7 @@ export function deleteMailbox(): void {
 }
 
 export function updateMailbox(): void {
+  if (isMailboxActive.value == false) return;
   deleteMailbox();
   setTimeout(() => requestMailbox(), 10);
 }