Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.

Any plugin issues need to be addressed to the creator of the plugin or resource pack.

If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.

I had to use this plugin because of the following response from a ticket from mojang [Mod] Michael Wobst added a comment - 10/Jun/19 12:09 PMThis issue has been closed asYour game, launcher or server is modified.If you can reproduce the issue in a vanilla environment, please recreate the issue.theyre essentially telling us that its server software like spigot that is causing this. wonder what md_5 has to say about it ?