Before reporting a bug, please confirm the following:
I got Gadgetbridge from:
If you got it from Google Play, please note that version is unofficial and not supported here; it's also often quite outdated. Please switch to one of the above versions if you can.
Your issue is:
The time of start and end of an activity is shifted back one hour. I started my walk at 5 o'clock, but GB shows the start at 4 o'clock.
Your wearable device is:
Mi band 4 Global, FW: V18.104.22.168
Your android version is:
Your Gadgetbridge version is: