New Protections:
1) Fixes the new piglin dupe that is currently floating around youtube. It's painfully easy to do, and affects all 1.16 versions of Spigot.. Paper however is unaffected. ->

2) Prevents players from using beds to destroy blocks when they explode in the nether/end, which can be used as a cheap substitute for TNT while looking for netherite or for PVP.

3) Added a user requested feature to disable shulker checks on block place. WARNING: Enabling this feature will potentially allow players to sneak illegally stacked / enchanted items stored in shulkers into the game! ENABLE AT YOUR OWN PERIL.
https://github.com/dniym/IllegalStack/wiki/IgnoreAllShulkerPlaceChecks