Every now and again asking to restart the client. It is annoying because as has just happened, you have to replay your action just before and if the shot hit first time it doesn't necessarily do so the second time! Not sure if it is my phone as doesn't happen very often on my tablet.
To be honest I can only guess that it's your phone, since it doesn't happen on your tablet. Do they both use the same wifi, or is your phone using phone data?