For my sensor nothing has changed, even with a 0.25 V more fresh battery. Swapped battery, without repairing/soft repairing. Only a few hours of silence between 21:22 and 07:58 last night.
Sensitivity reported as 0 in Phoscon API. Can I trust that value? Another theory is the sensitivity is way too sensitive and actually higher than shown. Just a random guess, based on the sensitivity trouble from Aqara vibration sensor resets sensitivity.