Orbi Satellite local routing issue

Problem is with Orbi Satellite routing to ETH attached NAS device on the Orbi Router.

General config;

Beamforming, MU-MIMO & Fast Roaming enabled.  Latest firmware on Router & Sats.

Synology NAS, wired connected to Orbi Router. IP: 10.0.0.10

Attempted connection via (any) device on the Satellite RBS50, such as my Macbook;

angr:~ angr$ ping 10.0.0.10

PING 10.0.0.10 (10.0.0.10): 56 data bytes

Request timeout for icmp_seq 0

--- 10.0.0.10 ping statistics ---

4 packets transmitted, 0 packets received, 100.0% packet loss

However, if the same device is connected wirelessly via the Router, it works;

angr:~ angr$ ping 10.0.0.10

PING 10.0.0.10 (10.0.0.10): 56 data bytes

64 bytes from 10.0.0.10: icmp_seq=0 ttl=64 time=1.965 ms

--- 10.0.0.10 ping statistics ---

3 packets transmitted, 3 packets received, 0.0% packet loss------------

I've tried changing ETH ports on the Router etc. to no avail. Any ideas?