So while I was trying out the neoforge port, there are some bugs that either are still present from previous versions of legacy4j, and some other bugs as well.

Flying into water gets interrupted (Also happens in forge)

The item sizes are incorrect.

Plays Java Edition's clicking sound than Legacy

Most of these "bugs" are caused by the mods' resource pack being below the vanilla one, for some reason this is Neoforge's default now