Type of Bug: Pathfinding?
Repeatable: Yes (2x)
Brief Description: When mining into the side of a mountain (grey block terrain), workers will occasionally become stuck above the digging area. While the event has not yet been witnessed initially, this can result in starvation since they are stuck. First time it was not noticed until starving messages popped up. Second time, after sending a rescue crew in to dig out the area that the carpenter had gotten stuck in, the carpenter teleported to the surface of the mountaintop and then had to be rescued with a ladder crew.
Further testing no doubt needed to see how this actually happens.