Bug Report

Hi there,
I have an issue, I assume regarding Ultimate Car Mode. Currently sometimes and I'm actually not able to reproduce the issue, the client connection to the server crashes if somebody drives a car.
The important thing is, it crashes only for those clients which are currently not driving the. The Client who uses the car is fine and can play along. It's actually a bit strange.

So for example: Player A drives the car. Player B, C and D are not using the car. Player A drives away and the first disconnected is for example Player B. C and D are able to play along. Player B joins back and C disconnects and so on. There is difference between the crashlogs, so I will just post one of them.

Expected Behaviour

Obviously the connection to the server does not crash.

Possible Solution

Actually no idea, 'cause my java skill are non existent^^

Steps to Reproduce (for bugs)

As mentioned I'm not able to reproduce but it seems to occur in the described way.

Logs

https://pastebin.com/XBE29tdr

Client Information

• Modpack Version: 3.1.2 Hotfix 1
• Java Version: 8 Update 251
• Launcher Used: MutliMC
• Memory Allocated: 5GB - 6GB
• Server/LAN/Single Player: Server
• Optifine Installed: no
• Shaders Enabled: no

World Information

• Modpack Version world created in: 3.1.2 Hotfix 1

• Additional Content Installed: Actually no additional content but I changed the fuel source like #3885

Feel free to ask, if you need any further information. :)