bro! do the following. I too have the same issue , but now I'm free from that go to settings>apps>device care>clear the data of that after that you won't get that problem atall (untill you restart the mobile again) I have the same issue before the 1st July update , so I used this to overcome the problem.after the July update, the I didn't face that problem still now.
bro it happens with me also while charging. It overheats while charging after recent update and then for safety the device automatically switches off for sometime to bring the temperature down and then after some time it automatically restarts
don't visit the service centre andall bro! because they will price you more without reason or any logic. so wait for update. and check my idea Also that was a reply to me from Samsung
To resolve auto restart issue please follow below given steps: Go to Settings > General management > Reset > Turn off auto start.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
