Late to the party, but I thought I'd update with some more info for anyone stumbling across this in the future. @MrHandyMan was at least partially correct in the assessment of the issue. In that thread, the launch option LD_PRELOAD="" %command%
is recommended to alleviate the problem. In my experience, this was not particularly helpful, and actually prevented the game from launching sometimes.
However, based on discussion on the Github issue thread, it seems that the issue was (either wholly or in part) caused by me having the Steam overlay disabled for CS, which I had done in order to fix an unrelated crash that seems to have been fixed. Enabling the Steam overlay fixed the problem, and my game seems to be running as intended now.