I can confirm the issue even when upgrading an completely fresh v7.1beta4 CHR so most likely the problem is not caused by any specific configuration.
I will send the resulting non working file via email directly to mikrotik as it is to big to attach it to this post.

Ok, i'm pretty sure i have found the error in my assumption:

I assumed the 12km would be achievable within the license free band.
But the AirFiber allows operation outside of that.
So yes 20 km are definitely possible at 70Ghz where the Oxygen absorption is negligible.

pfff Ubiquiti AirFiber 60 LR claims it can reach more than 12km when lhg60 only does 1.5 ????? 12km gives you about 150dB free space loss at 60GHz which is workable. But additionally the oxygen will absorb another ~10dB minimum for every km. So even in optimal conditions (66Ghz and no rain) one wou...

As far as i remember 802.11 does not really work with multiple clients on one Connection.
Basically the WAP has to masquerade all MAC addresses which breaks DHCP.

Try pointing the DHCP-Relay on the WAP at the real DHCP-Server.

You missed ether16 as untagged on vlan 20

The interfaces being disabled on the CAP is normal in CAPs Mode. The Interfaces should instead appear on the CAPsMAN. If the VLAN configuration on the Bridge correct? Currently all Traffic will be tunneled back and go thru 'vbridge' on the CAPsMAN. If that is not what you want you should enable loca...