Capsman Cap client unable to ping one another

This is what I’m getting in my cap-ac.

A able to ping B (and vice versa)
A able to ping C (and vice versa)
A, B & C able to ping HAP-AC2 and CAP-AC
B cannot ping C (and vice versa). The message is “destination host unreachable”

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If A, B & C are clients of HAP-AC2, they can ping each other. If they are clients of CAP-AC they cannot ping each other. Same subnet, same ip address.

What setting am I missing.

Seems that in the provision for cap AC “Client to client forwarding” is set to “no”.

Problem solved. When I first received my Mikrotik I feel like I married a router with a thousand check-boxes and dropdown-lists. I knew one of those would make her happy, I just don’t know which one. Thanks