Screenshotting the game with the Steam overlay makes all the models dissappear

To Reproduce

Take a screenshot in the newest development build on Linux

Specifics

OS (Windows, Mac, Linux) - Linux
Game build (e.g. 8193.8, or commit hash) 88.8193.36-9
Distro platform (BDC, Steam, GOG) Steam
Content overrides? (Steam Workshop? Overrides? Patch haks?) Yes, some override graphical/UI mods
Regression? (Build which broke it, if known) The development build - issue does not seem to appear in the stable branch

If needed, describe the bug

Taking a screenshot makes all the graphics/models disappear, all that is left is the skybox color and the UI, as seen on the below screenshot. Reloading the game works as a workaround.

Beamdog / nwn-issues

Screenshotting the game with the Steam overlay makes all the models dissappear #563

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