Well, this comes about as I'm using the latest IV/MTS version. When I noticed this while making a road for a map of my and testing it

I'm not sure anyone else is having this issue but I did restart my client

This report is as of 15.2.0

This is directly caused by this change:
2ffd6a5

I can fix this, but it'll likely cause more jittering in other cases. Pick your poison....

Fixed in V15.5.0.