Wrong Time for "fällig"

I use em client in german, so I don ́t know the exact english words.
The Problem: I create a new date in calendar (gmail) with a reminder. In this case 2 hours before. This works properly. But in the pop up window, there is the wrong time in the column “fällig”. Should be 2 hrs but shows 1 hr.

Timezone in google calendar is set correctly.

Hello,
send me the problematic event saved as .ics at [email protected]. Thank you.