I seem to be having the same problem with the action buttons, but it's more than that. When I click on a settler the stat box that usually pops up in the corner doesn't but it will if I select a scout or other combat unit. Once the stat box appears it stays frozen on that unit's stats (I can still move other units around) until its move is used up. Regardless, I never see the action buttons except the one that expands the action list, and clicking that just turns it into the collapse button.
Promotions are acting goofy as well. I get the notification, but the buttons to select a promotion don't show up until the unit's moves are used up.
Also, when I went to discuss something with another leader there were no buttons there either except for "back".
I didn't think to look at other screens at the time.
I hope someone has some suggestion - I don't know enough to figure it out, but certainly enough to make it worse.