ViaVersion Fly-Bug 1.7 users

[Picajoluna]

Some 1.7 users can trigger a bug that allows them to fly. We know particularly of a couple Aussie players who are able to do this. We think it's ViaVersion related.

[unixfox]

Would be great to test this plugin in order to know if that would fix the issue: https://www.spigotmc.org/resources/2ls-exploitfixer-professional-server-antiexploit.62842/