https://pastebin.com/jMTwhcFs
Server Version: Paper 1.14.4
Latest Dev build of HolographicDisplays.
Latest ProtocolLib (if necessary)

Don't know (I'm using older version of HD in 1.13 server where this isn't a problem), but I hope both.

Hi @LoXR, use last stable version of ProtocolLib http://ci.dmulloy2.net/job/ProtocolLib%20Gradle/lastStableBuild/, it fixes the problem.

Awesome, does this work with 1.13 or only 1.14?

Please update ProtocolLib to the latest development build, you're using an old build and that particular bug has been fixed.

ProtocolLib dev builds: http://ci.dmulloy2.net/job/ProtocolLib%20Gradle/