Since this mod requires the server to have it installed, it does not work on Bukkit-like servers, such as Spigot and Paper.

I'd like to say I'll be able to make this myself (and I'll let you know if I do) but if not, I would like this to be a known issue until a Bukkit-like plugin is made.

Good Luck! I don't think it should be too hard to do. You'll need the packet listener to listen for the sort packet here:

I'm not familiar with bukkit dev at all, but if you switch the mappings(here or there) I'd imagine alot of the code could be resused

Should mention in the readme that this mod must be installed in both client and server.