3 Deco's E75 pro working OK, after connectin one WA850RE as a client via 2,4 network is unstable - wifi devices are working well (5ghz mainly) LAN clients are not working - problems with getting ip address, dns is not resolving names or just generale failure of network. 

Setup

DECO1 - main router

DECO2 - station

DECO3 - station

WA850RE - client using deco's 2,4 wifi

lan device connected to WA850RE lan port. 

The end device connected to WA850RE is working like a charm...

If i poweroff the WA850RE everything is working OK, the same when i block the devices in the deco app. 

Any ideas if such configuration should work? 

Double checked the ip address of the wa850re lan device and it's in good subnet, no ip conflict etc.