After upgrading from version 1.6.4 to 1.7.1 (we have since bumped to 1.7.2) we started seeing NullPointerException crashes when updating a StateFlow value. I am not able to reproduce this locally, we ...
at net.minecraft.world.World.func_72939_s(World.java:2209) at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:550) at net.minecraft.server ...