So I just put up a bunch of ladders and I've just now realized that I can't climb them for some reason. This happened to me before, but it was easily fixed with a relog. Now it won't go away. I'm currently using CustomNPCs and nothing else. No smart moving. I'm in survival and the server is on peaceful. The ladders are being placed on sandstone and smooth sandstone, if that means anything. I tried this both on adventure mode and on creative as well but that didn't help. Suggestions?