TP-Link TL-WR902AC v3 Radio AP+STA


I'm stuck in a problem with my TP-Link TL-WR902AC v3.

In Stock Firmware, I was able to connect to a 2.4 or 5Ghz wireless network as client and Have Both 2.4 and 5Ghz AP Network working well, AP+STA Mode.

For now I, goes to OpenWRT to try adding my personnal L2TP VPN for my travels, because it's not avaible on stock FW.

So i'm on OpenWRT, Installed Travelmate, and surprisingly, i could'nt make a proper AP+STA on Both Band, If I uplink a network on 2.4, it disable my 2.4 AP, same for 5 Ghz. I tried almost everything I found : factory reset, clear the interface and wireless settings, unplug/replug...

If you know how to get rid of this issue..

Thanks for help