Just a quick update to my report above.
I did some more testing and found something very interesting. I tried using the Nvidia App's global settings to cap my frame rate to 144 FPS to match my monitor's refresh rate.
The result was a noticeable change. The bad news is that the game-breaking stuttering is still present. The good news is that it took about twice as long to start, and the freezes happened less often.
This really seems to suggest that the bug is related to some kind of cumulative stress or resource issue that builds up over time. The lower, capped frame rate just makes that process take longer.
Thought I'd share as this might be a critical clue for the dev team. Hope this helps you guys track it down. Cheers.
