Running Zabbix 6.0.5 on Debian Bullseye

I am using the built-in Template "Windows by Zabbix agent" for a Windows VM where I am running Zabbig agent 2. I have a disk for which the spave utilization is around 95%.

I would expect that the discovered triggers below would raise the problem.

However this is not happening and I don't have a clue. If I define a manual trigger like this it is working as expected

Anybody did experience the same issue? what could be the problem?

Thank you in advance for any hint.