I had several bug with AP, that I cannot select my AP that I currently building or of enemy which AP is in building progress.
When building is complete then it is ok, selectable normally.
Just when it is work in progress, it has weird bug, but not every single one of them, just 1-2 of 4 which are build at that time for example.
E.g.
I rush enemy NE, and he is building AP in his base, I want to attack it with my units, and AP is non-selectable…
Or I want to cancel my AP constrution, and it is unselectable, and I lose gold to enemy…
Really weird.