At the time you posted power levels, modulation and SNR were excellent. There's no errors showing, which could be because you'd just restarted the hub, or because of one of a number of known bugs with the Hub 4 firmware. Either way, there's nothing in the hub stats that explains the patchy connection you describe, and that is visible in the BQM. I'll mark this for form staff to take a look and advise - they can see more in the way of hub diagnostics than you or I can (assuming the hub is actually keeping track, given the firmware bugs).
If the response is "looks good from our side" you'll need to be persistent to get it resolved - the fault you describe and BQM show there is a problem, but VM staff have to follow certain protocols before they can book a technician (added to which, intermittent faults can be very difficult to identify and resolve, so any field technician needs to have a good idea of what they're looking for).