On Cosmic, gnome-shell version 3.30.2-0ubuntu1.18.10.1 I can't reproduce the bug anymore. I tested two known scenarios that were able to make the language layout indicator disappear:
* Locking the screen and returning
* Opening the elevation prompt (asking for admin password)
On Cosmic, gnome-shell version 3.30.2- 0ubuntu1. 18.10.1 I can't reproduce the bug anymore. I tested two known scenarios that were able to make the language layout indicator disappear:
* Locking the screen and returning
* Opening the elevation prompt (asking for admin password)
None of them are causing the issue anymore.