Thanks for the hasty reply!
So I ran the pingplotter test with different targets, this was with the XR500 connected. Each test was about ~10 min.
I did check the upstream levels for my modem just to make sure and it was at optimal levels. Not too sure what to make of it. Though I do run only 150mb DL and considering how many devices I have it could very well be that, but again not too positive on that,