As a problem that had started with the new CS:GO animations update, the warmup would stop at 1 second and sometimes players could not spawn in.

This issue has been successfully resolved. That is all.

Resolution:

File used: gamemode_competitive_server.cfg

Commands editted:
ORIGINAL: mp_warmup_pausetimer 90
CHANGE: mp_warmup_pausetimer 0

For some reason GaFooB must have changed that in the config file rather than editting the command "mp_warmup"