There's an update to the plugin you are using, if you are not aware already.
As for time, you should always set it so the map changes; otherwise, you'll have issues.
PHP Code:
mp_roundtime "90"
mp_roundtime_defuse "90"
mp_roundtime_hostage "90"
mp_timelimit "90"
mp_maxrounds "99999"
If you really want unlimited time.
PHP Code:
mp_roundtime "99999"
mp_roundtime_defuse "99999"
mp_roundtime_hostage "99999"
mp_timelimit "0"
mp_maxrounds "99999"
mp_warmup_pausetimer "1"
mp_do_warmup_period "1"
mp_warmuptime "99999"
mp_warmup_pausetimer "1"
mp_warmup_pausetimer "1"
Also make sure you're setting it in the correct .cfg file.
https://developer.valvesoftware.com/...ual_server.cfg