Crash Upon opening helm menu after previously opening it

[rusleader0444]

here is my info

• davincisvessels-1.12-6.355-full.jar
• Minecraft 1.12.2
• Forge - 14.23.5.2860
• https://gist.github.com/rusleader0444/afe6485f5d0ced95ae29f5fd1dd69d4d

(do note i'm using the RLCraft modpack with DV) i built my ship then assembled it just fine no overflow or anything (building an airship only 37% balloons which means i need to add another 3% ik) then i mounted it to test and it works as a boat (as it should because i'm lacking enough balloons) then i put the ship back as a soild block build (dont remember what its called) then went and opened the helm to find it was unassembled? following this i re-assembled the ship and closed the menu only to then go to reopen the helm and it instantly crashed my game upon doing so.

after further testing it crashes anytime i open the helm, close it, then try to reopen it or if i try and break the helm block.

if i've done this issue report wrong do let me know please as i am just brand new to using github and this report format

(Edit: forgot to mention i'm playing on my own Bisect server that is running the same mods as i am, if you need anything from server specs or whatever please feel free to ask and i'll try to find what you need)