Over several days, each 0-slot CPU task I was assigned is overseen by Prof. Vincent Voelz.
Possibly he may have insight into this issue.
Zero CPUs set, CPU slot running
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Re: Zero CPUs set, CPU slot running
It looks like for FAH v8.1.18, setting CPU=0 (instead of CPU=1) in the settings for GPU folding works to fix the issue (and not download a CPU WU)