IntelliJ's Maven Plugin is greying out parts of POM

I've had a strange issue with how POMs are displayed in the editor. Various portions of the pom are displayed with grey text, similar to how it displays comments. But what is grey seems to vary from project to project. I've gone through and disabled every plugin to find that it is the Maven Plugin that is having this effect on how the POM is displayed.

My question is this: Why?!? What is the plugin trying to tell me? Are these problems I need to fix? Or is this a bug?

I can't seem to find any documentation explaining why the plugin is behaving this way. But maybe I'm not looking in the right places.