Describe the bug
As it seems when you upgrade light engineer boots with flippers and then try to sprint in the water the game crashes.

Environment

• OS: Windows 10 Home
• Minecraft version: 1.12.2
• Forge version: 14.23.5.2855
• ImmersiveEngineering-core-0.12-98.jar
• Immersiveintelligence-core-0.2.1.jar
• Also used immersivepetroleum-1.12.2-1.1.10.jar

Crash log:
Short description is "Ticking player"
crash-2022-02-02_11.31.00-server.txt

Proof gif:

Also the same problem is occurring with snow rackets but with snow in this case

Crash log:
Short description is "Ticking player"
crash-2022-02-02_11.57.13-server.txt

Proof gif:

I'll try to solve this issue (maybe it's my issue btw) by downloading newer version of forge
Edit:
I tried 14.23.5.2860. It did not helped at all. Game crashes with the same problem

Have the same issue. After a little bit of digging it seems to be something with the armor's damage value or attribute modifier.

Same issue. Btw you did a great job documenting the issue.

Fixed.