Running Thunderbird 115.16.0esr (64-bit) on Ubuntu 22.04.5 LTS fresh install. Steps to reproduce: If I right click on any email in the inbox and select "Open Message in New Window", the message does not appear. Actual Behaviour: However, another dot appeared beside the Thunderbird icon in the Gnome Dock. Clicking on the Thunderbird icon brings up a couple of thumbnails, one of the main application and one containing the message that was opened. Clicking on the thumbnail does nothing. Expected Behaviour: The message window should come into view and clicking on the thumbnail in the dock should also bring this window up. I believe this is a bug but if it is some configuration issue or workaround exists, I would appreciate the help. Additional info: $ uname -a Linux ubox 6.8.0-49-generic #49~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Nov 6 17:42:15 UTC 2 x86_64 x86_64 x86_64 GNU/Linux Gnome version: 42.9 Graphics: NVIDIA Corporation GM107 [GeForce GTX 750 Ti] Windowing System: X11