I cant see anything odd in the stats you have posted- although never looked at upstream burst before !
The BQM looks iffy so posting up the Network logs would help. Others will comment but it "could" be a fault in the Hub so an upgrade is worth a try (see below). Also checking all the connections and a pinhole reset are worth a go too.
_____________________________________________________________________________
First switch the Hub off for 5 minutes AND unplug it from the mains. Whilst it's off, do a quick check that all of your coax cable connections are in nice and "finger" tight - at the Hub and wall box and also at any connectors etc. Ensure there are no “unterminated cable loose ends. Disconnect all the connections and reconnect to be sure. Also check that the internal wiring is ok with no kinking or chaffing, check that all looks good with the outside cabling and wall box. Then switch it on again and leave 5 minutes
Then do a Hub “pinhole reset” - but, make sure the 2 passwords on the Hub sticker are still there and legible first ! Disconnect any ethernet cables from the Hub, and then with the Hub still "switched on" throughout, press pin in firmly with paper clip/SIM tray tool or similar "thin thing" and hold it there firmly for 60 seconds – release the pin then leave the Hub 10’ to stabilise. See if it has improved.
_________________________________________________
Try the "free" SH1/2/2ac upgrade/replacement scheme - see the link below - as they are trying to get everyone onto Hub3's (may be a delivery charge).
https://www.virginmedia.com/shop/hub-swap.html?buspart=uk_app_connect2_hubswapIt works first time for about 50% of customers, but if you get the - "Ooops - please call" message, then this usually means you are on an old package that the computer cant recognise so they want to speak to you about it. When you call it in (calling at 08.00 is the best time to get through without wait times) it's a coin toss whether the agent knows about the scheme. If they do they will just say "ok we will send one out" (there may be a delivery charge) - or - they say "oh no, that's an upgrade there will be a charge and it starts a new contract". Neither of those statements in correct - so just say no thanks and leave the call. Maybe try again - different day different agent.
After that you could try texting on 07533 051809 - include account name/number and what the issue is and see what they say – replies may take a bit longer
Finally a VM person should pick this up here and sort the swap for you, but it can take several days.
_______________________________________________________________________________
--------------------
John
--------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.