[1.20.1] Multiple UnionFileSystem from same mod/jar on memory

Minecraft Version: 1.20.1

Forge Version: 47.4.10

Steps to Reproduce:

1. Add only one mod as example
2. Do a heap dump while you are in world
3. Load heap dump on Eclipse MAT tool to run a query

SELECT toString(ufs.key) FROM cpw.mods.niofs.union.UnionFileSystem ufs WHERE toString(ufs.key).contains("journeymap")

Description of issue: