Hello,
Same Problem here. On 16. Aug., I installed 8 Buttons and 8 Shelly 1 PM for 8 drying rooms to turn on the drying device and shutdown it down after 3 hours. In all rooms, the battery of Shelly Blu is empty now, after not more then 12 days. I installed the latest firmware on 16. August 2023. Sorry, I do not know the version, because I have to order batteries first, but it was the latest, available on 16. August 2023.
Very annoyed ...
Stephan