https://bugzilla.kernel.org/show_bug.cgi?id=204611
--- Comment #2 from tones111@hotmail.com --- The problem is after v5.1, and before v5.2. It's very reproducible on v5.2 but might be less frequent as the bisect progresses. Attempts have driven me into the weeds, but I'm still trying.
It looks like another user reported the same issue here: https://bugzilla.kernel.org/show_bug.cgi?id=204227
During my bisect I was seeing visual artifacts without the lockup so I believe they're separate issues.