X20 units in AP mode shows as disconnected
Hello
I have just bought a 3-pack of Deco X20 units (V1 EU), to replace current routers in my house. I'ts an old building with three floors and an Ethernet cables running from main ISP router to each floor, in a "star" configuration. It was a bit of a mess, and a few of unrelated WiFi networks, so I wanted to replace them.
The old setup was:
Internet --> ISP-provided Modem/Router --> 3 Ethernet cables going to 3 routers (each on a different floor, with it's own WiFi SSID).
The new configuration is:
Internet --> ISP-provided Modem/Router --> 3 Ethernet cables going to 3 Deco X20 units, single SSID between them.
From what I've read, I understood that I have to switch Deco's to AP mode, and then they should have no issue with connecting to router in "star" confuguration.
I managed to set it up, and all Deco units are working, except one detail - both in mobile app and in web UI, two units are labeled as "Disconnected from other Deco units".
This is despite the fact that both those units have their LED green, and provide Internet connection just fine. They are also visible when I scan the network for connected devices. I found some threads on this forum, where customers reported that some units disconnected randomly, but in my case this is permanent state. Because of this, Deco app cannot monitor devices that are connected to those two units.
Is this expected behavior in such configuration, or is my mesh network not working correctly? Did I mess something up during setup?
I read a lot about Deco before buying, but all the information I found indicated that mesh "star" configuration with ISP Router at the center should work just fine... and not that they will act as three separate APs... and especially not that some will be permanently disconnected.
I would be grateful for any help or guidance.
Below is the screen from app (in Polish, sorry)