I'm having a problem where my supply line are occasionally disappearing. I made a line from the drive in to Red Rocket and it was fine for a while, but now the supply line is gone from my map when I hit the supply option and I can't find the settler I told to do it. It happened once before with my Sanctuary to Red Rocket line but it eventually came back. Is this a common problem?

The Provisioners can be killed, or the Brahmin can, so I have had supply lines have disrupted due to that. I accidentally killed two of my provisioners, and saw a rocket turret kill another.

Someone out there wants to destroy everything that you built from the ground up.