LEM X crash during phone call

I know I’m running old firmware (DMN_DM19_LEMX_20181110), but I’m going to mention this problem, then see if installing the current update corrects it.

Battery at 50%
Start phone call, call connects, LEMX reboots.
Call again, connects, LEMX reboots.
Battery now shows 1% !!
Connect to charger. Check battery one minute later, shows 50%.

That’s it. I’ll be back after the update…

Probably nothing to do with the call, just a battery calibration issue. A fw reset could fix it…