[FeuerSturm]

don't get me wrong, but there's no code that would reset it after
death or round. it's only reset on map restart/map change.

you can use the ResetHUD event to allow using it again after death,
or the RoundState event to allow it again after a round.

further more there's some minor bugs in your code,
just some brackets wrong, if you like i can help you fix that and
extend it a bit.
so let me know.