Defenders getting stuck during patrols

FlamingZelda

When I create a new patrol for a unit there is no issues: I walk around a bit through my outpost and then head back to the start, However when the playback of said patrol begins, the unit gets stuck and will stop moving halfway through the patrol. To make sure this isn't just a playback issue, I tested my level, and sure enough, the guard walked part of the patrol and then just stopped moving all together.

Units seem to freeze their patrol whenever they walk near a wall, under an upsidedown triangle block, or next to a half-size block rotated on it's side.