I lost 2 treasure chests this evening. I bought all three this evening and then when I tried to open them the screen went to the chest opening screen but didn't expand to the 4 cards. Thinking it was a glitch I closed the program and tried again; happened a second time. I have gone in the gallery and have gained nothing.
I am running the game on an iPad mini 4, iOS 10.2.1, PFID-AB1B65056B824FDA