Just trying out the new version and have started a new factory. However, some of the slots in the line, have randomly decided they no longer have a route to the stock pile.
Please see screenshots.
I have also attached my game save.
Any more information you need, please let me know.
EDIT: Exiting and going back into the game fixed it, so the issue may or may not present in the game save.
bugreport-Mattz0r.zip (107 KB)