With Groovy 3.0.3, Groovydoc does not render @see tags properly. When trying to link on another class in the same package from the class description, the linked class name is rendered, but the link is not created:
Another case is when @see is used from a method description trying to link a method in another class in the same package. In this scenario, method name is duplicated, and the link is missing. Something like this:
There might be other scenarios. These two are just those that I stumbled upon.