1. There's a bug in the zeppelin mission: you can't land anymore on it (at least with the Fokker D.VIII). The landing gear will simply go through the structure and you'll crash. I tried it several times but I just kept crashing over and over and over.
2. The HUD stops working randomly: I can only tilt my phone to turn if I'm in the air, or use the brakes if I'm on the ground. The rest of the buttons simply don't work, including guns, bombs, chat, autodestroy/leave... It usually fixes itself in half a minute or so, but sometimes you have to restart the app. It seems that I'm not the only one, I've seen some PC users complaining as well.
3. The tank turret moves ridiculously slow now in Android. Most times you'll die before you even aim to your enemy.
4. It now takes very long to load the game or to join a match (at least in Android). In fact it sometimes takes so long that I have to restart the app.
All of them happen in the latest update.