Sporadically freezes

The game freezes sporadically, it only helps to push the homebutton and go back into the game. operating system iOS 11.4

Have you downloaded latest iOS update (11.4.1)?

Just wondering if that would help…

I have the update on 11.4.1 installed today, until now, the error does not occur. only after the game starts it freezes for 3 seconds and then continues