So this has happened to me three times since upgrading to iOS 8 yesterday on my ipad mini (original). My drive stick gets stuck in track rotate. Every time it was clockwise (right) rotation. First time, I was STEAMING full speed ahead after someone at the end of a game, and all of a sudden, my tank just starts rotating. I let off the touch pad completely, and it kept turning. Slammed a few other directions, and eventually it un-stuck. Happened again while trying to circle around someone to the left. Tank just got stuck in right track rotate, even when I removed my finger. Last time was similar to the first, steaming full speed ahead, but this time I began a slight right turn and again it got stuck. Again, when I removed my finger it stayed stuck.
I thought maybe it was my bad driving the first time, but that it continues when I remove my finger and doesn't change until I smash multiple other directions is the troubling part. Hard to say if it was stuck for the same amount of time or not. It wasn't long, but in a pretty fast game like this it felt like eternity. I died as a result 2 of 3 times :(. Also find it odd that it's never happened to me in thousands of battles until iOS 8. This is on an original iPad Mini