So we can get a better idea of what is happening please set up a free “Broadband Quality Monitor” to continually monitor the state of your connection and record any network dropouts. It does it 24/7/365 and it keeps a visual record of any/all your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and in discussions with us. Make sure you uncheck the “ignore ping from WAN side” box in the settings if you see a wall of "red" - note it will take an hour or two to start seeing a sensible picture. please run this for 72 hours and post the results here so we can have a further look into this for you.
today, its pretty band again. I will collect the monitor data, and post some results. From a glance ( I did set up a monitor a few weeks ago) I can see that the 'bad upload speeds' coincide with high packet loss.