In the Javadoc view, the documentation of an @Override method is shown correctly, if you place the cursor on the overridden method name. However, if I have a Javadoc tag like @return in the documentation, javadoc can't be found any more. Here is an example:

public class JavadocBug {
    /** @return Test */
    public int test() { return 1; }
    public static void main(String[]args) {
        new JavadocBug() { @Override public int test() { return 1;} };
    }
}

If you remove @return in the documenation, it will reappear in the Javadoc view. Same happens for other Javadoc tags like @param or @see.