So i have the following problem with my P9 setup.

I got a set of 3 P9.

1 is the main and located on the 1st floor

2 is located on the 2nd floor, but within the same residential unit.

3 is located on the ground floor, in a second residential unit (Grandma living there).

There are also two X50 in the same network.

When I first started all P9s and connected them to my network 1 and 2 got connected over WI-FI and PLC. 3 got a connection to a X50 satellite, only with WI-FI, no PLC. Not what I was hoping for, but I thougt ok, 3 is located in another residential unit, maybe the connection is not stable enough to get a PLC-connection.

The I restarted my main (1) and connected it to the power outlet of a TL-PA7019P as I need a wired connection to my cellar for my heating system. (I want to manage this with to TL-PA7019P, as a P9 would be just "overpowerd" for this task).

I got the info, that I need to connect my PA to the second Ethernet-Port of my P9 to be able to use their network, as the P9 PLC and the PA-PLC are not able to "talk to eachother" natively.

The main is still in the same room, only with the power outlet of a PA between its power cord and the power outlet of the room.

I hope my explenation does make sense.

After this connection 1 and 3 got a PLC and WI-FI connection, but 2 does not get a PLC connection any more.

I just don't get it - why do the two P9 satellites not get a stable PLC connection? Why is it only one that gets connected over PLC?

Thanks!