Here's how to duplicate it: So let's say my style setup is as followed: Master Style -> Default Style -> Custom Style I create a CSS template within Master Style and include the style property: Code: @testProperty Now, I don't have a style property of that name defined within Master Style, but I do within Custom Style. If I use Custom Style, the style property is still undefined. The only way to get around this is to edit a template in Custom Style and use that style property to get access to it. Is this by design or a bug? I want to be able to provide style-specific features to users and this makes it difficult Thanks!