This bug I discovered today, while building a cemetery, though it was avoided before it continued to kill my entire town. If left unchecked they would all walk to their death. I plotted a space for a maximum sized cemetery exactly 109 tiles away from the City Hall, in a directly straight line west of my town hall. There was a small curve in the path but directly west of town hall.
I started noticing that Hunters, Builders, Harvesters, and Laborers were all traveling to the cemetery to gather food. I saw a hunter travel to the center of the cemetery plot like 50 tiles outside its hunting zone to pick a patch of berries and then go back, and then I watched as other laborers continued to do the same thing, going there for food, only to touch the edge of the plot and walk back. Nearly dying in the winter time.
If I hadnt destroyed the cemetery, it not only would have halted all construction but killed my entire town. Though I admit it was really far from town, still doable for the AI in the summer. But it completely bugged all the citizens. I couldnt figure out why food wasnt being gathered correctly, and they nearly starved too.
This bug happened at year 3, of a new village, in the highlands with a village population of 26.
Edit: Also noted that I saw after destroying the cemetery was the remaining villagers walking to the cemetery after its destruction, but the fire wood choppers, farmers, laborers, hunters, harvesters, and every AI traveling to the cemetery to gather food and wood (stalking food or wood) It was very strange.