Thank you both for the report
I have discovered where the CPU eater is hiding. It is in the Freeze panel. Collapsing the freeze panel is not helping either and it should, but as a temporary fix while I think how to solve this, you could disable completely the freeze panel. Edit the global options.ini file and set display_freeze to 0: display_freeze = 0
Let me know if that fixes the problem.
If it is another thing, I'll keep hunting for the bug.
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