It is stuff like this that highlights how poorly designed the ticket system is.
https://answers.ea.com/t5/Bug-Reports/jml-event-buttons-dissapeared-and-cost-me-tickets/m-p/9709995#M43970
"Our game is broke and you lost tickets and resources, oh well who cares, nothing we are going to do about it."
I get the disappearing UI or stalled game (whatever you want to call this bug) is hard one to track down and fix, however this is just a horrid response when it affects other parts of the game.