What had happened? – Angry Birds 2 Review

Game used to be awesome. Now frequently when I get to round 7 in Arena challenge the screen will not accept input to continue via free bird or paying 60 gems (2 times in last week). Pigs have even survived direct hits and falls from heights which causes use of additional bird to be used for 2 little pig. Pigs are now surviving underwater. What happened?
Review by uncgrad2005 on Angry Birds 2.