Well, its funny when looking at these two you posted. D4 is showing a loss of only 1% at one location, but D3 is showing a 63% loss just after ASNet here:
So there actually may be an issue someplace after it leaves Charter, but its not showing up all the time, if that makes sense. I will say the results are mixed, but if need be you can run the WinMTR again when you are in the middle of having the high ping. (once it starts, just run the app)
Let me know if you find anything different, but thank you for doing this!