Zach's suggestion isn't gonna work. I know you'll try it because he's asked for it - but I'm sure your hopes aren't high. It might improve if they give you a Hub 5 instead of the Hub 4 - but that Hub has its current share of problems too, none-the-least with DHCP operations.
If you're not using VM's stupid Pods, then it's best to delete the wretched CONNECT app so that it cannot screw your router up. Power Reboot the Hub and you should have access to the Hub's GUI. You can control everything from there. The fancier features of the wretched CONNECT app can be ignored - as they are by the tens of thousand who are wise the wretchedness of that app. Good idea, crap delivery by VM and even crappier support because this has been going on for months.
If you do have Pods, send them back to VM as not fit for purpose because of the wretched CONNECT app. Seriously. Installing your own mesh WiFi system, free from the stupid ties that VM impose with their stupid Pods may cost you a bit of dosh. But you won't look back in regret over such a wise move.
Me? What do I use with my Hub 4? Modem mode, may own router and mesh. It minimises use of anything VM have produced and simply enjoys the excellent broadband circuit performance.
My whatsit's a kipper if anyone reasonable disagrees with me.