[DavincisVessels] My ship keeps bouncing in water any fix?

My boat keeps bouncing when it goes to the water idk how to stop it and it just keeps bouncing higher and higher me and my friends just wanted to go to an adventure with a custom boat so we can adventure longer without having to come back home but when I mount it and go to the water it starts to bounce.. 


Also my version is ForgeOptifine 1.12.2