@Rioja Yes, there's still no option to select the source. The updated firmware is to optimize through "Network Optimization" feature. I've a mix of Deco M5 & M9+, 2 units each but the two units...

@PatrickFaria Private message @TP-Link and let them know you want to test the beta firmware and the model M5 etc. If there's mix of models in your network, you need to upgrade all firmwares as well.

I've installed the beta firmware for both M9+ and M5. It works well for me with correct source now. My config is 2 units of M9+ & M5 each for a 3 story house. The speed from weakest spot has improved...