I only run Android. I don't know much about IOS. There was just a post last week or so, about WIFI drop outs using IOS devices.
With my Android, I tell it to forget the house router and only connect to the MTH WIFI. My devices aren't current and only are used for the trains! I get devices from my family that are about to be retired.
From reading so many IOS posts here, I'm leaning to towards there's something more with IOS devices that's in play? or is it that the devices still have service connections? (and mine are retired?)
or ....? Android using a different operating system keeps (locks on) the MTH WIFI better?
I can only guess here.