I have two C510W's that go offline after working perfectly fine for a few months, now the both go offline, I have to do a reset to get them working again, I have done all the checks on my broadband...

@Thunderwing I'm having the same issue on two C510W's, works for a while then they go offline in the app, I've tried everything I can, I bought a WiFi extender thinking that would work, but same...