Doesn’t sound great, you have updated and done all the reconmended precautions?
Logout of market after activation
Disable auto backup in wp end
The everyday comment makes me think of the backup on wp end causing issue suggested elsewhere.
I have backup set and no issues so not sure why that was suggested but was all the same.
Not that it helps am thankfull I’m not facing your issue.
You have 1 licence per database right? Not accusing or subjecting anything - just asking…
It’s hard for most to offer ideas without knolage of how licence system works and guess this has not been discussed openly as undoubtably would lead to unscrupulous abuse with licence work arrounds.
Not sure if or what kind of logs samba licence server has and if Tayfun is able to check to see if there is any suggestion of a cause on samba side.
Luckily like said have not had licence issues to date - touch wood, so not been in position to need to delve into licence mechanics.