This mod has a weird light glitch issue. If you look at mobs from a certain direction all mobs lighting is flat without shadows. It may be related to new forge and probably one of the enchantments. I noticed some of the enchantments like unveiling doesn't do anything it may simply interfere with lighting.

I been working for a year to figure out what mod is causing this and I think is this mod in combination with something else not quite sure what probably the JVM version and the forge version.

this doesn't happen on openjdk8 but it does happen only with the built in java