Well, you use Mi Fit. Actually my Firmware has no other changes except Turkish FW and dd/mm date format.
So, I believe that GadgetBridge app that you have used to flash new firmware has changed some MB3 settings. Try to delete GadgetBridge disable and enable again settings in Mi Fit.
So, I believe that GadgetBridge app that you have used to flash new firmware has changed some MB3 settings. Try to delete GadgetBridge disable and enable again settings in Mi Fit.
MiFit_3.4.4.apk