Please be sure to
update PV on ALL servers and on the
bungee (if you are using it there).
Fixed a serious security-related bug affecting bungee servers
Fixed a recently introduced bug of non-vanished players being added to the data.yml file, which can lead to the file size becoming too big causing substantial server lag in extreme cases. If your data.yml file is already too big you can stop your server, delete it and restart the server. All players will join without vanish after this, if you aren't using a database.