use the groupId as conversation id to create a conversation when this is a group

ts/receiver/dataMessage.ts

@@ -599,7 +599,24 @@ export async function handleMessageEvent(event: MessageEvent): Promise<void> {
     sendDeliveryReceipt(source, data.timestamp);
   }
 
-  await window.ConversationController.getOrCreateAndWait(id, type);
+  // Conversation Id is:
+  //  - primarySource if it is an incoming DM message,
+  //  - destination if it is an outgoing message,
+  //  - group.id if it is a group message
+  let conversationId = id;
+  if (isGroupMessage) {
+    /* handle one part of the group logic here:
+       handle requesting info of a new group,
+       dropping an admin only update from a non admin, ...
+    */
+    conversationId = message.group.id;
+  }
+
+  if (!conversationId) {
+    window.console.warn('Invalid conversation id for incoming message', conversationId);
+  }
+
+  await window.ConversationController.getOrCreateAndWait(conversationId, type);
 
   // =========== Process flags =============
 
@@ -613,20 +630,12 @@ export async function handleMessageEvent(event: MessageEvent): Promise<void> {
 
   // =========================================
 
-  // Conversation Id is:
-  //  - primarySource if it is an incoming DM message,
-  //  - destination if it is an outgoing message,
-  //  - group.id if it is a group message
-  let conversationId = id;
-
   const primarySource = await MultiDeviceProtocol.getPrimaryDevice(source);
   if (isGroupMessage) {
     /* handle one part of the group logic here:
        handle requesting info of a new group,
        dropping an admin only update from a non admin, ...
     */
-    conversationId = message.group.id;
-
     const shouldReturn = await preprocessGroupMessage(
       source,
       message.group,