Unknown attribute 'jump_height'
Summary
Describe the bug encountered in detail.
Steps to reproduce
item configuration. https://pastebin.com/2QcpEFNy
Current behavior
java.lang.IllegalArgumentException: Unknown attribute 'generic.jump_height'
Intended correct behavior
Apply the jumpHeight property to the to item.
Server log file
Proposed fixes
It seems to be incorrectly changing JumpHeight to jump_height, when it should be jumpHeight.