I've had a strange bug with dumping pop up. I've had it working no problem for years, not changed anything, but my Dwarves have just... decided to stop. When I mark something for dumping, the checkmark saying someone's coming pops up for a minute then disappears. This'll flash a few times then it never comes back. Meanwhile I have dwarves without jobs and clear access to the area, including burrows, and the dumping zone. I changed nothing about dumping. I reloaded a save and the bug popped up around the same time, though I'm not sure on the exact day, I restarted DF and my computer and neither worked to fix the bug. I uploaded both saves where dumping's bugged, as well as one ("End of P11") where it isn't bugged a few weeks before it becomes bugged around the middle of Late Winter.