AC1900 5g WiFi Radio Issues

Hi all,

    About 9 months ago my AC1900 R7000 started to reboot itself and would do so about every 10 minutes. I've upgraded the firmware, downgraded the firmware, factory reset and even tried a custom firmware...DD-WRT, still have issues. Current firmware I'm using is v1.0.9.34_10.2.36. During all of this I decided to just run the 5g wi-fi signal. It worked fine for a few days then, BAM!, same issues. Currently I'm using only the 2.4g wi-fi radio and there are no issues. If I try to broadcast both the 2.4g and 5g wi-fi signals in about 35 minutes, my router will reboot and continue to do so. My questions is, is there a fix for this or has the 5g wi-fi radio gone bad and there's nothing to be done?

Thanks,

Plaster1064