I'm also having the same issue, the VM Connect App was working fine albeit the App itself is very poor but at least allowed me to view what devices were connected to the two WiFi pods I have.
Suddenly the App has stopped working and simply will not find the Hub 4 despite being 6 feet away from it and connected to the same WiFi. Have done all the usual tricks, clear cache, clear data, delete / reinstall App but it still won't connect. I'm not prepared to factory reset the hub.
Like others my Hub will not respond to admin login unless it's rebooted and then will only show a maximum of 14 devices connected to WiFi (I have 30+) and changing the name is a right pain (having to switch menus). My service is 1gb but I get nowhere near this (500mb max) with WiFi even worse.
Is my hub 4 on the way out as surely this isn't expected behaviour? I reboot it every morning to get anywhere near the speed I need to WFH effectively.
Have asked Virgin on many occasions for the new Hub 5 but get fobbed off with the line it's still trialling or for new customers only and can we send you another free WiFi Pod.
Would appreciate anyone from Virgin Community to provide some answers and helping me receive the service that I pay for.