try resetting your phone! It wont work mostly. If it works lucky for you. Note has this complaints. People just take it to the service center and get it fixed. Its a hardware failur ( battery ). Replace your battery and your phone will be fine!
Re: why does my screen keep turning off while phone in use
Does this get off during inactivity? If yes then please check your sleep time in your display settings! If its still the same reset your phone! And then try again. And if it still doesnt help then take it to your service center.
I feel that the moto x play will be better than one plus 2 in many areas. One plus 2 could have come up with a bit more upgradations , especially the NFC! We'll see how things go on between one plus 2 and the moto x!