@TP-Link Thanks for the quick reply. This is just so weird! I've seen exactly the same behaviour/screens on my iPhone and iPad for several days now, but having just fired up the Deco app on my iPhone...

I've had a 3-node mesh of Deco P9s running for the past 5 months. The Wi-fi performance around the house is great but recently the functionality of the Deco app (iOS) seems to have taken a huge step...

I'm looking at the Deco P9 as I'm planning on building an office/workshop at the bottom of the garden that will utilise an existing mains supply but has no Cat5 and is beyond the reach of the house...

Thanks for the comprehensive answer and spotting my typo - I did indeed mean P9 and M9.

I'm trying to help improve a friend's messy home network. His house has dense, solid walls and floors, and no internal cabling other than mains. He is looking to improve both the internal wi-fi...