It's quite peculiar; this library conflicts with CustomNpcs created using sheepscripts in combination with CustomNPCs 5.20 and SheepKeyLib1.3 and Sheepscriptlib1.20.1. When I play a 1.12 minecraft modpack, as long as this library and Tinkers' Evolution are included, a NullPointerException: null Error in Tick Entity occurs when fighting against a Custom NPC boss (customized with SheepKeyLib scripts). The error persists even after removing Tinkers' Evolution, and only disappears when this library is removed. This error does not necessarily cause the game to crash, but it results in entities within the boss fight area being instantly killed or mysteriously vanishing, including tamed pets or maid followers. Moreover, the NullPointerException: null Error in Tick Entity continues to occur even after the boss fight ends. The error does not stop unless the game is restarted; exiting and re-entering the game does not resolve the issue, and the error only disappears after a full game restart.