Note that I am using a modpack, but that this interaction should be easily recreatable with just openglider and forge.

https://paste.dimdev.org/pomicuwosu.mccrash

Issue Description:

Gliding and boats do not mix

What happens:

Game will crash (vanillafix caught the crash, but anyhoo)

What you expected to happen:

glider shouldn't deploy in boats, or, gliders should work in boats.

Steps to reproduce (important):

1. in boat.
2. deploy glider.
3. faff around on land until game crashes

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Affected Versions (Do not use "latest". Forge version is nice, but not usually necessary.):

• OpenGlider: OpenGlider-1.12.1-1.1.0.jar
• Minecraft: 1.12.2
• Forge: forge-1.12.2-14.23.5.2808.jar