https://bugs.freedesktop.org/show_bug.cgi?id=108194
--- Comment #8 from Hadrien Nilsson freedesktop@psydk.org --- I started both Steam and the game with R600_DEBUG=nir, it has no effect on the bug.
Graphics settings are all either "Low" or "Disabled", with the exception of v-sync. This includes anti-aliasing (thus no EQAA).
My system was slightly upgraded to kernel 4.20 and Mesa 18.3.3 (the bug is still here and looks the same).