LAN ports on mesh not working after guest wifi

[the_birdy]

Hi,

RT-BE92U main router (3.0.0.6.102_37504-g4be1e5e_1088-g416ff_BB0B, latest)

RT-AXE7800 mesh node over Ethernet (3.0.0.4.388_25142-g8c68976, latest)

tri-band wifi on both. When guest wifi is enabled, lose connectivity on mesh router Eth ports. IP assigned but can't ping any internal IP. Wifi including guest one continues to work like charm on both main and mesh.

Any ideas ?

[jzchen]

Is Ethernet Backhaul Mode enabled?  If not try with it enabled and report back....