[Ignitionnet]

Modem levels are out on downstream but that you are pegged at bang on STM'd level for upstream and it's so consistent suggests pretty strongly that you're STM'd.

Find out from TS if you are being traffic managed as seems likely. Considering the reports of people finding themselves not managed when they expect to be it's certainly not beyond the realms of possibility that VM are having a play with the traffic management or even that there's bugs in the code which have recently come to light.