I've been using a pair of TL-PA9020 with no issues. I just bought a 2nd set, tried to add a 3rd adapter into the network, the entire network (wired & wifi) falls apart. I paired the new adapter with the original pair, it shows up on Utility app.
Modem/Router (Also connected to Ubiquiti AP) --> Powerline Adapter 1 --> Powerline adapter 2 (Also connected to Desktop Computer) --> Powerline adapter 3 (Also connected to 2nd Ubiquiti AP)
Adding that 3rd adapter, which I plan on adding the 2nd AP on, fails. I don't think it's the AP causing the issues, because the network craps out as soon as the 3rd adapter is plugged in.
Any insights would be greatly appreciated.