Archer C7 V2 19.07.1 802.11s mesh on 5GHz not working

On Archer C7 V2, OpenWrt 19.07.1, I configured an 802.11s mesh node on 5GHz, other node is a Cudy WR1000.
They can see each other, but the connection is not working in two directions, Cudy's interface has no received packets.
With -ct firmware and drivers, the radio is not even starting as master. With default firmware is starting properly, but no mesh.

last month i tried meshing archer c7 v2 to xiaomi r4a gigabit.
on 2.4GHz mesh has good speeds.
on 5GHz mesh has low speed.