Hey

When coming back from dimensions like Aroma mining dim or Deep Dark, entities becomes invisible sometimes just a few of them other times all them.
It only happens if you use the portal to get back from the dimension, not if you tp back.

tested with forge from 2760 up to 2768 and iChunUtil-1.12.2-7.1.4

StoneBlock#160

So the conflict is between codechickenlib and ichunutil.
He’s an video of the issue plus showing mods
https://github.com/Sunekaer/stoneBlock/files/2479323/invis-entities.mp4.zip
Covers1624 says that “CCL doesn't touch EntityRendering”

As iChunUtil has been redone-over (again) for 1.15+. I am closing issues pertaining to 1.12.2 and earlier.

My apologies that I've not been able to address your issue.