One (always the same) of my 3 Decos installed shows in the Deco App (2.7.4) as "disconnected from other Decos"

However, it seems to work? At least it gets to the White light normal status.

So; is it really working ok?  

Is this a known problem?

Anything I can do to resolve this?

I have seen the question for other Deco models, but not for this  M4R 

Thanks