This is how the game works, it does not apply Ce in anvils, Keep this in mind for the next time that every Ce on the 2th slot item will just 'poof away'. You could have always blackscrolled it aswell.
Its all up to barty, we don't decide on stuff like this.
Cause thats the one where you can dupe xp, its either that or remove /bottle. and removing all the bottles that exist, don't think people would want that so :>
i agree on 2 of them, just not on the vanilla xp one.
If you have a normal shulker you can't lock them with a private sign altho you can do it with colored shulkerboxes.