Empty combinator in class subselector adds space

When creating a global or local block class and adding a subselector, selecting “Empty” as the combinator before adding a new layer should (as far as I understand) join the two layers with no space, e.g. “.class1.class2” so that it applies to a single element that has both classes. However, when inspecting the styles that are actually delivered to the browser it shows as “.class1 .class2” as if I had selected “Descendant selector” as the combinator and hence it applies to an element of class2 that is a descendent of an element of class1. Correct me if I’m wrong, but this is a bug?