This is a problem caused by Omniwood, which is not compatible with OmniSea or Seablock at all since it messes up a lot.
Gonna re-add the disclaimer that Omniwood is not compatible to the Modpage again, that got lost with the rewrite apparently.
Thanks for the report
Edit: Declared Omniwood as incompatible in 2.0.5 to avoid further confusion, if its installed OmniSea wont work