All connections are tight and Hub is far away from anything that could cause issues.
Upstream levels keep flicking between 16qam and 64qam with a stop off at 32qam every now and then. When they are all on 64, upload speed is acceptable.
When they are all between 16/32 speeds are awful. I would be better off sending packets via Royal Mail.....
Seems to be evenings/night time when it happens, though it did take all day to upload some 2800 photos from my iPhone to OneDrive today, but I was working and didnt really notice until I checked it at 4pm (started at 10). Not a massive file upload by any means but maybe it shows the upload has been bad all day?
Seems to be working(ish) now (between 10-15Mbps) but still a pain. Especially when trying to upload files to work tonight....
Do you think Hub or line at fault (most likely?)
Edit: And dead again.....

BQM setup here (ignore the 100% packet loss at the start, I set my router to accept ICMP and then didn't save the settings *facepalm*:
https://www.thinkbroadband.com/broadband/monitoring/quality/share/d29d4f56c3f8548b88fee3dc362d0f29df...