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(+1)

I’ve not seen anything like that, but if you are using GMS2 from Steam (rather than linking your Steam account to YYG account and using the regular version), arbitrary things may happen as Steam actively to link launched apps to the same App ID they were ran from (so, GMS2 in this case), which breaks Steam API for them.

Also do not use Steam API versions higher than what Required SDKs specify unless you want to risk your game hard crashing due to changes in function signatures.