I have been using Natural plugin in Eclipse to edit my Gherkin feature files. It was working perfectly fine, but all of suddenly ctrl+click is not working, it is supposed to take to the step definition method. I'm using Eclipse Oxygen version.
Better to move away from Natural plugin. It doesn't work perfectly in recent days.
You can un-install Natural plugin and install "Cucumber Eclipse" plugin. You can search for "Cucumber" in eclipse market place, and it would appear in the top of the list.