Just making this note at the recommendation of another, I'm reproducing similar
behavior across both Linux distributions, and Windows 10. The behavior is as
follows:

Linux-Manjaro Linux kernel 5.4.0-1-MANJARO, Mesa 20.0.0-devel (git-dd77bdb34b),
and LLVM 10.0.0 (compiled from Git master as I recall):
Boot, launch Overwatch, or SteamVR. Usually after a period of 1-2 hours,
displays will stutter a few times, before a full hang, leaving the last
rendered frame on each display.

Windows 10: latest insider build as of 11/5/2019:
Similar behavior in the end, aside from the duration of stability being 3-4
hours it seems. Launching SteamVR, I can run for 3-4 hours, and then it
stutters, hangs for a few seconds, then recovers. Then it'll do the same a few
moments later with a longer duration before the recovery. After this repeats a
few times, the display either hangs on the last frame, or all displays go
black. After this, I have to hard-shutdown the same way as I do for Manjaro. 

This may not be the exact same behavior, but I don't know of a way to log this
particular behavior in Windows.