Yes, I shut it down (I don’t put it to sleep or hibernate ever), and even so it would lose 1-2% per hour when I don’t use it. This is a batch 3 FW13 so I’ve been putting up with this for a while - both under Windows (10 and 11) and under Linux, current BIOS, etc.
I’m glad most of the folks who post have better experiences - mine has been hit and miss.
I posted in this thread because this fix was sleep-related, even if the problem was not.