After updating to 0.13.0, I opened a savegame that I created in 0.12.x. One of my trains did not move in auto mode, so I tried driving it manually. I noticed the locomotive got stuck on a single rail tile. When trying to remove this rail, the game outputs: "This cannot be mined." I tried shooting it with a rocket launcher and I got the message: "This cannot be damaged." The tile cannot be selected for removal by construction bots.
The problem persists when I isolate the railtrack from the rest of the rail network and when there are no train signals involved. The train simply stops at the glitched rail tile, as if it has reached the end of the tracks, even though the track continues.
It is possible that the locomotive was stationary on this tile when I last saved and closed the game before updating, but I'm not entirely sure of this. I have not found this problem anywhere else in this savegame.
![Image](https://forums.factorio.com/images/ext/e1cedd25781f015e6e182cb119e7cde3.jpg)
![Image](https://forums.factorio.com/images/ext/02fd0f247e26c100a8201ec3b82f7304.jpg)