Battery drains when OFF

I know it was discussed in the forum, but I believe it was for older FW versions.

 - Hardware Ver. 4.0

 - Firmware Ver. 2.80 (388665)

 - BT - ON

 - ANT+ - ON

inReach Mini was switched OFF about 00:00 yesterday - battery 97%, today it was switched ON about 13:00 - battery 91%.

I understand BT and ANT+ interfaces should not work (and consume battery) when device switched OFF, but who knows.

Any thoughts what can cause so fast battery drains?