Possible Fixes

Yes

Modpack Version

0.3.5

What happened?

I'm just reporting this bug here to let the modpack owner know, but this bug is not a bug from the modpack itself but from the mod Ars Nouveau. they need to fix it, the modpack owner can only disable the crafting of every gravity related spell to "fix" this, but in the end, its the Ars Nouveau mod author that needs to fix this.

The bug is pretty simple, the bug works by using the vanilla gravity duplication glitch.
with the Leap spell, you can turn ANY block (that doesn't contain NBT and thus unable to move, like chests) into a gravity one, then you just need something like the vanilla end portal, for example, the undergarden portal, the aether portal, and so on. (no, the nether portal doesn't work) and that's it. chunkload both sides and you are good to go. (the chunkloading is not needed, but if you don't chunkload both sides, the item stay to the other side of the portal, so you need to enter and leave it every time to obtain them)

video here: https://youtu.be/HzuwrTpZsSg

Developer reports

baileyholl/Ars-Nouveau#1511

i think this bug works also in multiplayer, so every server with the Ars Nouveau mod and The Undergarden mod, you can have infinite blocks of everything.

i didn't test it, so if someone can test it in multiplayer, please let me know