slow Plasma shutdown

Plasma takes a long time to shutdown. After click on shutdown icon I see black screen and I can't even go to tty.
This also happened when I logged-out and pressed shutdown.
Here are some loges:
First - no shutdown at all


Second - it shutdowns but slowly

Before last plasma stable update shutdown took no more than about 5 second.

I also did:

Edit /etc/systemd/logind.conf
KillUserProcesses=yes

but no results.

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