game freezes on mobile

Today it happened to me for the first time although I updated to latest game version like 1 week ago.
I was looking at another player's team and the game just froze, was like my touchscreen wasn't working. I tried restarting the app and a black screen appeared. Tried it a couple more times and same black screen. After 10 minutes or so I restarted and it worked for some time, but then again froze and everything repeated.

I use a Samsung Galaxy Young (GT-S6310) and my Android version is 4.1.2

Same on iphone.

Freezes for me as well sometimes and have to restart the phone. Happens not so often though.