KDE freezing and still suspension issues

I have exactly the same thing with slowroll for about two weeks now.
Only a reset works.
I have no idea what causes it.
Doesn’t matter if I use wayland or x11.
Sometimes it just happens out of the blue?
Very strange.
I keep a close eye on it to see if I notice anything.

Read something about Virtualbox…
Given problems I added a line to the kernel parameter in the bootloader (kvm.enable_virt_at_load=0)
Then Virtualbox at least works again, see also: Warning for VirtualBox users and Kernel 6.12