while playing on a server that has dimensions that flip between game modes a player had an incident where the backpack was deleted in a way that wasn't possible before (on this server) prior to installing Curios (and therefore moving the backpack from its designated spot to the "back" slot in curios.

in the backpack only spot (between the player render and the armor slots), creative delete DOES NOT wipe the backpack(this was often used as a protection on our server)
in the curios slot however, the backpack gets wiped along with all the other items.

i'd like to see config options for keeping the backpack's integrations disabled/enabled on a per-mod basis

an alternative would be a sort of world based "look up" or log file for pre-existing backpacks tied to UUIDs so that lost backpacks can easily be retrieved or searched offline by admins

Unfortunately backpack being deleted from curios slot is more likely a curios thing, have you checked curios config to see if there's no command to disable this behaviour?