TYT MD-UV390 PLUS reboot

I have a TYT MD-UV390 PLUS and it will randomly reboot when receiving a transmission. I have my radio turned on for 10hrs/day 7 days/week. It probably happens a least 4 times per week. Do I have a defective radio? Is there a way to update the firmware?
Thanks

Sounds like a firmware issue. If you can reach out to us, sales@buytwowayradios.com, I can investigate it further with my tech support team and see if I can reach a solution for you.