OK first things first, the BQM you provided is really, very, very good for a VM connection - no obvious issues there. Except a BQM only really graphs the connectivity between their infrastructure and your hub, it’s a useful tool but nothing more than that - certainly isn't definitive about, well anything really!
VM officially don’t support VPNs, now this doesn’t mean they don’t work, (otherwise, I’d be in trouble as I use them every single day); but rather they won’t provide any sort of technical support for them - and absolutely DO NOT touch ‘Gadget Rescue’ with a barge pole, or even someone else’s barge pole, they will be about as helpful as a house brick, although the house brick won’t charge you a sum each month for the privilege!
VPNs can be a bit awkward, their main concern is to secure a connection between two endpoints on the internet, and anything that makes them think that the connection might not be secure can make them ‘fail safe’ and simply drop the connection. And there are multiple types of VPNs, some may work perfectly on a VM connection, others may not!
In your case, we have established that your underlaying internet connection seems to be fine, the VPN works well on a mobile hotspot, ie a non-VM connection, which hints that there is something which a combination of a VM connection plus whatever VPN your company uses and the way it has been set up; simply isn't reliable.
If you want my advice, dump VM as soon as you can! OK not really anything that have done wrong but, realistically you are one out of some 5.5 million broadband customers - they are absolutely not going to invest resources into fixing your issue! Now possibly with a lot of further research and digging into these things, it may well be fixable, but VM won’t do it, nobody is going to pay me to do it, so I won’t, not sure anyone else on this forum will be in a position to help either - which rather leaves you stuck between a rock and a hard place!
Probably not the answer you wanted to hear, but it is an honest one!
