I tried the reflashing and I am not on WiFi.. I'm just absolutely confused on why this one always reverts back to default pool settings every time it disconnects.
That's odd. Tried different microSD maybe? Just since it's a relatively common troubleshooting steps with Raspi (and similar SBC) computers. Otherwise may need help from @jstefanop.
One thing to also try would be controlling the hashboard from a normal PC using the binaries from page 1. Just to make sure the hashboard is 100% fine. Though I don't think an issue on the hashboard should / could change settings on the Orange Pi.