Only IPV6 After Reboot / Poweroff

NanoPi R4S 4GB w/ OpenWrt 19.07.5

Having an issue where now suddenly after say a power outage, a poweroff command VIA SSH or a reboot command VIA LUCI I'll only get limited connectivity over IPV6 (sites that are IPV6 native Google, etc...) and IPV4 fails to issue on any connected device. The only way I can get IPV4 back with everything working as intended is to restart the device VIA tapping the reset button once. I assume this button prompts a software reboot command as it changes no settings and seems to go through a proper reboot based on the LED behavior. This never used to be the case and nothing has been changed on the router in over a month. The device "seems" to be operating fine in this mode as I still have (what seems to be) full IPV6 internet connectivity. Could there be a corruption somewhere? I wouldn't even know where to start. Thanks in advance for you help!