As can be seen in the image below, there are 2 missing lines from the active green dot to the 2x up and right blue dots. The missing lines can be inferred from the layout - there are no green dots touching those 2 stranded blue dots.
No part of the dotted lines are visible at any zoom level.
The nodes are accessible as normal, it's purely a visual bug.
The lines are not visible on the atlas when viewed from the Hideout map device, the Ziggurat Refuge map device, nor by using the World Map keybind.
Bug report reference #1,169,380,504.
Edit: the lines reappeared after completing the map:
