Your upstream power levels are right at the minimum of the acceptable range, and if there's any other unfavourable line quality issues that may be enough to explain your problems. I'd suggest waiting for the VM forum staff to advise, as there's nothing you can do yourself, and if you phone it in the offshore call centre will tell you to restart your hub and declare it fixed.
Thank you for reaching out to us in our community and a very warm welcome to you. I am sorry to see your connection is intermittent, I have had a check our end and I can see that your upstream power levels are out, this can also be caused by a loose connection, please can you check all your internal connections are tight and reboot the router afterwards.
If you are still having the same issue afterwards I will be happy to look into this for you, I will send you an invite for a private chat shortly please click on the purple envelope to accept.
If the issue is resolved by the above steps then please ignore the invite.