I have new Deco X10 Mesh -system in my house and I have an issue that, at least, two (older) devices lose the connection after some time (15-45 mins) of activity. 

Devices identified are:

- Oldish surveilance camera

- Old Android -phone 

I have more exeperence with Android and issues are following (phone is used only for streaming music from stereos etc., i.e. not in active use):

- If the phone is "on the table" for a day, the connection stays

- If phone is taken into use, connection is lost in middle of streaming in 15-45 mins 

- Connection can be resumed by turning wifi off and on

Same devices worked without any issue with my old router - so it seems to be some settings issue, but what?