Duplicant "Pacing" Bug

I went back a few cycles and it looks like Joey Tribbiani was pacing for at least 5 cycles before Jeremy Clarkson deconstructed his ladder and he died on the spot. 

Encountered this once, I needed to select the dupe and give him a move command by a few tiles, then he "snapped" to a deterministic path. Might be caused by pathfinding giving the dupe path in the opposite direction after he made a few steps, perhaps select the dupe while he's "pacing" and check how his path changes.

There were a couple of dupes that wouldn't follow any move commands in either direction, but I think they may have fixed it. It had something to do with water puddles. At first I thought it had to do with the ladders but it kept happening over and over again and always in water that had collected on the ground. If I see it again, I'll try giving them a move command of a few tiles to see if it works. Thanks for the suggestion!