I have a feeling that this might be caused by those fancy lightning effects added. the game gets “heavier” with every graphic improvements added and gets hard for weaker devices to process. i am having massive lags even on my iphone 6 now, so androids might struggle even more with all those bling blings...
And: The bookmarks of 3 teams have disappeared from the skull quests! i was hoping that they would be added to the cosmos levels (to make farming troopers with eddies/allies easier), but they have been removed from another mode instead :/