I've noticed that the building license count on the top summary line likes to change (or not change) to the wrong number. I often notice that the number is not what I think it should be, and if I refresh it fixes it.
I use that number to help me know how many mines might have depleted while I was away from the notifications and history. It's annoying to have to refresh to make sure the number is up to date.
This happens mostly when adding (or deleting) a building, but other times it just 'happens'.
I wonder if this is common to other players too