@Jomi, thank you for your confirmation - sorry to hear you are on the same boat.
@Peter_Kawa, see screenshots below
First one is Shelly din via LAN, second is fibaro z-wave. Both no longer work.
As mentioned, manually triggering the flows (bypassing the event trigger) still works, so the flows themselves are ok. I tried replacing the trigger cards with new ones, that did not work.
Current version: 13.2.0-rc.2

