It could be blocking blood moons, since they spawn at a fairly specific range and direction and if that code is checking the bedroll, then no zombies. I'm slowing getting to that code, since I think I will be the one maintaining it now. 100 blocks is far where zombie pathing is concerned. Was hoping to look at that stuff this week, but now I'm working on using offline player bedrolls and land claim blocks for disabling cleared sleeper volumes, which is a fair bit of code changes. Just part of the A17 process to make this stuff clean and working well.