H-mech

At least I got a lot more time of normal operation without rebooting.
Unfortunately, I found out another point where even turning this mode off doesn't help and the error comes back.
This happens when rebooting the current desktop

Hello. I had the same problem! There is a solution in my case. Maybe it will help you.

In Houdini settings, on the Network Editor, Nodes, and Trees tab, you need to turn off Node Info Windows Close When Losing Focus if it is enabled.