WDS Link stuck on 54mbps

Hi

I have a WDS link setup between a: hAP ac and a hAP ac lite using only the 5hgz radio.
The connection between the 2 works okay, but the link established between the 2 AP’s is only at 54mbps. I can connected to the AP’s with latops at much higher speeds.
Has anyone got any hints / things to check for getting the WDS link to go above 54mbps?
Both routers are on 6.37.3
Setup photo attached, any help is appreciated.
-Cam
hapac.png

Hi, Is the client also set at 5ghz ac only with the same channel width?

Please upgrade to the Release Candidate version where this problem with the WDS has been fixed.

The Release Candidate firmware fixed the issue.
Thank you.