Garmin Vivoactive 4 - battery drain after firmware update

Hi, following a recent update all of our Garmin Vivoactive 4 (we have 3 in family) are suffering from battery drain, specifically mine goes from 100% battery to 0% in 6 hours without any physical activity, effectively making the device (that was working fine up until 4 days ago) completely unusable.

We have tried soft resets, hard resets (full reset data and settings), remove device from Garmin Connect App and re-add, searching for new updates but nothing, here is the current firmware version installed:
software version: 7.80
gps version 6.00
ant/Ble version 8.02
wifi version 2.60
tsc version 2.05
sensor version 20.04
WHR version 5.00.05
connect iq 5
bmx 5.0.5
secondary bmx 0.8.0
api level 3.3.6

Many other users seem to have experienced the same problem (even with vivoactive 4s) so I ask an Administrator to highlight the discussion and give us quick feedback on when and how Garmin will resolve the problem.

Thank you,