So I've had this problem for awhile and have confirmed with asking the other players that it is more than likely a bug and not me being blind to what I need to do. (Although, admittedly, that happens a lot too.
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So basically, any time I have an enchantment or creature with an ability that takes its action to activate, I can't seem to use it. I can use abilities that take actions if they play off targeting another figure but the cards that have abilities that just happen when they're used don't work. I know there should be a little star over the figure when I click on it, but I'm not getting that, nor am I getting anything down in my status box that tells me it's my turn.
The four examples I have of this that have happened:
Ghost Ship: I tried to use the effect that returns it to my hand but it wouldn't let me. I had enough flux as it was the first thing I tried to do in the round. It was chained at the time, so if that prevented the ability from working for some reason that might be why, but I doubt it.
Mogi Nest: Can't use its effect to get a new Mogi. Again, I've had plenty of flux.
Planar Intersection, Fire: Can't make Flamekins with this either. Still had flux.
Apprentice Timesap: Everytime I wanted to use his "Dim target figure" ability, I never saw his star appear again. I tried clicking on another figure after that, which would work if the figure was not an enemy within his range of moving up and attacking. Otherwise, if he was as said above, he would just walk up and attack it.