The Long Dark: Wintermute Pt. 5 (Linux Playthrough)

The game seems to hate the maintenance yard area in the Broken Railroad map...for me at least.

As soon as I bumped into Methuselah the game looks like the framerate stutters, I fired up mangohud to monitor it and it was showing a solid 60fps while v-sync'd. CPU was around 15% and GPU around 35% so it's not a hardware thing, even dropping the settings from ultra to medium doesn't fix it.

After leaving the maintenance yard the game goes back to running smooth, wonder if an older version of proton will sort it?.