Hello! Now I’m with you also! 
If to press on stop btn I have
systemd-coredump[22685]: [🡕] Process 1110 (plasmashell) of user 1000 dumped core.
Operating System: Manjaro Linux
KDE Plasma Version: 5.23.1
KDE Frameworks Version: 5.87.0
Qt Version: 5.15.2
Kernel Version: 5.15.0-1-MANJARO (64-bit)
Graphics Platform: Wayland
May be the more bug report the more understandable the issue? We have a bit different ways to think/describe, skills in English so desc will be lighted up will be from different points of view and we could have a bit different configurations (also kernels) so bug triggers could be a bit different, which also light up the case at different angle.
Also that that all 2 link in the thread:
Reported: 2021-08-06 12:56 UTC by Patrick Silva
Reported: 2021-09-21 12:15 UTC by Patrick Silva
So that reported triggers was not caused by the
Today it is
KDE Plasma Version: 5.23.1
but was reported on
Qt Version: 5.15.3
Frameworks Version: 5.86.0
Operating System: Linux 5.11.0-34-generic x86_64
Windowing System: Wayland
Distribution: KDE neon Unstable Edition
DrKonqi: 5.23.80 [CoredumpBackend]
and
KDE Plasma Version: 5.22.80
WHILE WE DIDN’T HAVE THAT ISSUE ON THAT TIME and environment.
So we are waiting for a fixes of non-our cases. 
Than… let’s report ours at last!