Delve - Crawler line terminates between sites

Re-visiting a recently completed (crawled) segment in a mine, I found that the crawler line terminated mid-way and that I was blocked from going any further beyond the crawler line. Additionally, the nearby delve waypoint (see screen captures) is not even the correct waypoint for either the two termini of my path nor nearby waypoints. This is an odd one.

Bug report submitted in-game. #3,363,283,331

Steps to repeat:

1) Complete a delve.
2) Travel back to the mine head and re-stock with flares and dynamite consumables.
3) Travel to the starting point of the just completed delve using the subterranean map offered up by Niko in the Hideout.
4) Begin to re-travel the route to the end-point. The game's fog of war will have been re-established on the route.

Note: I had previously run this path from the opposite direction after having completed the delve; there were no issues. Yes, I tried to dynamite the invisible wall keeping me from moving further down the hallway. No luck.

Capture #1 - Bug report # and example of crawler line which terminates in a hallway.



Capture #2 - Close-up of the line termination



Capture #3 - Map overlay showing the nearby and incorrect waypoint.



Capture #4 - Delve map showing my location on the path.



[EDIT]

Capture #5 - coming at the point of blockage from the other direction, there's no issue.



[Edit #2]

Capture #6 - Travelling even further, the same issue is encountered going the opposite direction from when I initial encountered the blockage! Is this by design???



Capture #7 - location on the delve path for reference.