Hi, I have a Deco M4 Mesh wifi kit, configured in AP. mode, I have 4 units

They are all cabled with Ethernet Backhaul on Gigabit interfaces.

Wifi speed is ok, but I see strange things with devices.

I have 2 HP printers, which are on the Wifi, but they are not in the online devices. They have fixed IP's and also out of DHCP Scope. They appear offline in the app.

I have 7 sonos speakers on the Wifi, but they are not in the online devices. (On DHCP). They appear Offline in the app.

Several other devices are not in the device list as online.

The fast roaming is disabled.

Does someone has an explanation why i don't see all devices which are connected to the Wifi?

Its not only related to 2.4/5 Ghz band