[BUG] Messages to group chats sent from secondary Axolotl won't show up in Signal desktop

[tsiksum]

Description

When posting to a group chat from my secondary Axolotl my message will not show up in the group chat in Signal desktop. Instead, in Signal desktop I receive an error message in the chat "Note to Self" saying that a message from [my own name] could not be delivered.

If I post to a group chat from Signal desktop my message will show up properly both in Signal desktop and in secondary Axolotl.

Versions

Axolotl 2.0.4. as secondary app on Fairphone 3 (20.04.) and Lenovo tablet (20.04).
Android Signal app on Waydroid on FP3 as primary app.
Signal desktop 7.0.0 on a Linux machine.