Numerous players report a CSGO Crash after alt-tabbing or changing resolutions
https://crash-csgo-gamblinpjkd229.cloudhinter.com/posts/get-rid-of-csgo-crash-site-10-reasons-why-you-don-t-have-it
Many players report a CSGO Crash after alt-tabbing or changing resolutions. Fixes include setting fullscreen mode consistently, changing resolution back to native, and upgrading GPU motorists to minimize stability issues.