Hey, found an interesting bug, where when I place a sign and load the world again, if it has a missing textObjects object in it's .json file, it will not load correctly and produce an NPE in file TileEntityPole.java line 40. Looks like adding a simple != null fixes that but I let that be your decision on how to solve it. Proberly this could happen on other objects in the .json files too, but I didn't currently came across another one.

latest.log: https://paste.ee/p/gEjm4

Fixed in V19.11.0.