Scene start time has 1 hour shift

Hi, I have created some scenes that switch on or off e.g. a Shelly Plus 1 PM. The scenes switch the device at a specific time of the day, e.g. switch on at 7.45h. See attached screenshot.

Here is the problem: The device switches on/off 1 with a 1 hour shift. Today, it switched on at 8.45h instead if 7.45h (setting for Saturday), see screenshot.

Time zone settings should be correct, so I cannot find a reason for this behaviour. Could it be a bug? Any ideas on what to check are welcome!

Note that I have a number of devices where schedules are active, and they all work fine.

Of course I could also add a schedule to the device instead of creating a scene, but I control the scenes described above with other scenes, which is the reason why I implemented it this way.

Thanks

Michael