@David-TP 

I just to know when is Extender in OneMesh mode with Router then ussualy is unstable and working like in restart mode wifi connection lost and again connecting... in tether app i see this moment like is disconnected and again connected signal power is still okay to work in extender mode.. i worked on this i tryed reset extender to default settings but not helps, i tryed downgrade fw and without change... so then i turn off onemesh on extender and on router and it helps me for few hours and days sometimes is one day he works ok sometimes few hours... Problem looking how extender is connected to main network but havent acess idk if havent legit IP adress or what... i think i could set static IP adress to extender but i dont do it for now i will copy this log from router and extender and i ll send it to this email....

  @David-TP 

And i forgot add Extender in my living room(in AP mode) work normal but my new Samsung TV QE60a sometimes usualy in few days notime me about wifi disconnect i must get off wifi and again turn on... idk if dhcp has problem or what i open settings and when get connect then tv connect to wifi but dont take IP about DNS etc... i must just turn off and again on DHCP auto on tv and then TV get all IPs and will work ok so i think there is problem with DHCP multicasts or unicast???