The game completely froze for several seconds causing my IPad to freeze till I closed the app

For no reason the game completely froze causing my IPad to completely froze till I close the app. I was playing the game until the game completely froze of several seconds during the lag I press the home button 2 times to close the app. The lag was so bad that it cause my iPad to lag a lot till I completely closed the app. after closing the app the Bug was gone. So this issue needs to be resolved fixed soon! Epic fail!!