have you tried turning off your modem for a while then turning it back on? https://community.tp-link.com/en/home/forum/topic/111130

@Mattjtemp just a suggestion. you could also log in at http://tplinkdeco.net/ and view the logs, not sure it will help

@Mattjtemp I'm no expert but have you tried the M5 outside the holder, or even elevated slightly? I find my M5's get very hot, I actually made a little stand for them for ventilation purposes. Wonder...

@klipse Thanks, interesting it's only slightly more coverage, thought it might be a bit stronger than that. I'm in a similar situation, the X60 isn't too much more than the X50 for two units, but...

@klipse Thanks. Do you find the X60 has better coverage than the M9 Plus? Just tricky to decide because by the looks for it, V1/V2 of the X60 all but lack support now, missing major features and...

@SteveWex Interesting. I don't need an outdoor node, but I have just learnt about EasyMesh routers. I wonder if, with those each being dedicated routers for boosted coverage, they might work better...