Can anyone help. I've had the phone for over a year now with no problems but in the last week, the power off indicator slides in from top right and I dismiss it but it keeps coming back in and eventually starts a reboot. It gets to Asus boot screen but then constantly reboots. Randomly it does fully restart but then it can start to reboot again at intervals. Then it works perfect for a day and it's starts again. I've taken off any apps I've installed recently but no difference. Any suggestions. It's on Android 9. Thank you in avance David