Unifi AC HD ethernet problem

Hello!

I've been successful installing an a couple of AC-PRO.

But now trying to install 22.03.2 on a AC HD.

Flashing goes as expected but when I reboot into OpenWRT I get severe packet loss pinging 192.168.1.1 and the LuCI Web interface is unusable. Same setup locally wired to a PC is stable when I revert to Unifi software.

Any suggestions what to try next? Older version, a snapshot?

I did notice it doesn't have an internal switch but instead uses the AR8033. Could it be something to do with that? I tried looking at release notes and commits but wasn't exactly sure what to look for.

Thanks