Messages from Matterbridge merged falsely

Steps to reproduce

1. Create a Chatroom in Nextcloud Talk
2. Add a Matterbridge bridge
3. Start Reading messages provided by bridge-bot on desktop with proper username in the title
4. Switch to Talk-Android and see all the messages merged losing the username in the title

Expected behaviour

Talk-Android should keep the usernames of the senders in the message title to make it possible to understand who sent which message.

Actual behaviour

Alle messages are merged losing their username title leaving it appearing as if one user sent all the messages. It somehow works in the desktop version and is only seen in the Android app. Guess It is merely caused by the wrong message meta data used for merging.

Device brand and model

Fairphone 4

Android version

11

Nextcloud Talk app version

15.0.1

Nextcloud server version

24.0.7

Talk version

14.0.6

Custom Signaling server configured

No response

Custom TURN server configured

Yes

Custom STUN server configured

No response

Android logs

None triggered.

Server log

None triggered.

Additional information

None so far.

Start by reproducing the Matterbridge scenario in Talk-Android 15.0.1 with the listed server and app versions, comparing Android with the desktop behavior. Inspect the message metadata used when bridge-bot messages are merged; done when distinct sender usernames remain visible in Android message titles, with a regression check for the reproduced case.