Graph wrong even database and panel settings are correct


today I installed grafana 7.1.3 and added my 3 temperature and humidity sensor to it. Unfortunately even the system time is correct (German time zone (gmt+2)), the database entry is set to the correct time and the time option is set to browser time (which is gmt+2)) the graph is displayed around 2 hours in the future. Therefore I am only able to see the graph when I zoom out.

My database:

The graph

As you can see the graph starts at 12:10 instead of the corrct time 10:10.
Does anyone have a hint for me what I did wrong ?