ABC sensors stopped working after update to 8.40

After updating the firmware to version 8.40 the compass stopped working completely (calibration is also not possible, the calibration screen keeps displaying indefinitely despite following the displayed instructions), calibration of altimeter and barometer displays only info "Calibration failed". Reset to defaults of the watch does not help. Does anyone have similar problem? Unfortunately on Garmin servers there is no longer 8.20 version to download, so I can't go down with software to lower version. Does anyone of you have this version and could share it with me?

I also noticed that the size of the golf map files is several times larger than before. Usually they were around 30Mb and now maps for Mk2 are around 200Mb. Map versions with the same number for Fenix 5X have normal size....