RT-AC87U - Media Bridge - RP-AC68U

Hi,

I've a RP-AC68U in Media Bridge mode with the main router RT-AC87U. In the RP web UI, I see both bands are connected to the main router ( Parent AP ). However only 2.4GHz band seems to have the traffic and 5GHz doesn't carry any traffic. I tried to re-configure the RP in the Media bridge mode only with 5GHz ( skipped 2.4GHz) but the status remains the same as I stated above.

Any idea?

Thanks