Been having problems especially when playing games. I noticed display stuttering/fps drop when playing games. At first, I thought it could be an app optimisation issue but it seems to happen to all games. I thought it was an iOS issue but doesn't seemed to be at all. Is anyone else suffering from this? The only way I managed to find a fix is to enable low battery mode and gameplay is smooth again (very weird). I've never had this experience with my previous iPhones.