Hello,
A friend and I was testing your mod, and we found a duplication items glitch with the luminous crafting table.

What happens and how to reproduce ?
First you must be at least 2 players.
When you break a crafting table (luminous/starlight/celestial) with something in the crafting grid :

• Player 1 stays in the gui to take the items when the crafting table breaks.
• Player 2 breaks the crafting table and collect items on the ground.
  So we can duplicate anything like this :(

What should happens
Player 1 should have the gui closed when the table doesn't exist anymore :)

Mods version
forge-12.18.3.2239
astralsorcery-1.1.4-beta

Hope you can fix this, it's a nice mod :)