Client-to-client Forwarding causing unstable Wifi

Hi All

I have a rather strange issue.
I have a CapsMAN setup at al client, and the moment I enable client-to-client forwarding on an interface, the wifi keeps dropping on a fairly regular basis.
If I uncheck this option, the wifi is then perfect, except for the fact that users cannot use the LAN printer.

I have not found any solution to this problem, after much searching and trying to understand what could be the cause

Any assistance please