plasmashell crash-freezing on startup, requires SIGKILL

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System Information:
CPU: AMD Ryzen Threadripper 2990wx
Graphics: AMD Radeon RX 6900 XT
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0
Kernel: 6.14.6-arch1-1
Platform: X11

I noticed the following behaviour when starting up a plasma session:

If I leave SDDM screen showing for several minutes, I can login and everything works as expected.

If I type type my password in SDDM in less than ~5 minutes, I get a session without an application launcher and a frozen desktop.

I can start a terminal using a keyboard accelerator and then I have to restart plasma-plasmashell user service and as it’s completely frozen, the SIGTERM timeout expires and a SIGKILL actually restarts it after about one minute.

I usually fix it by running the command below, but I want a more permanent solution:

systemctl --user restart plasma-plasmashell.service

I don’t think this is a bug or a configuration issue, because it works after restart with the same configuration. I am thinking it’s a race condition between plasma and something else, but I don’t have enough knowledge to troubleshoot this issue on my own and would appreciate some help, please.

Here’s the journal of such service:

journalctl --no-hostname -b0 --user-unit=plasma-plasmashell.service

initial run:

second run, after restart…

Please let me know if you need more information to help troubleshoot it.

Thank you.