When I first open Empires and Puzzles, the game is very smooth. For example, panning my base around to look at all the different buildings is buttery smooth… no stutter. However, when I send the app to the background – to check Line, send a text, etc. – and then come back to the game, the game performance degrades. Panning my base around now has a noticeable stutter to it. No amount of time resolves it and the only issue is to close the app completely and reopen.