Adding one other bug. Repeater does not use its own MAC adress for 5GHz connection, but clones the first connected device. I have reserved the repeater MAC-s in DHCP Server, 50:6C to .100 and 56:6D...

Do you want to sell your stuff in the EU? - Wake up and start fixing your firmware. Literally, i have a RE450. The speed is all over the place, starts with 150 Mbit in high speed mode (ISP 300/15),...