Contains rule for folders does not work when '.' in name

[SandmansDreams]

Not sure how to properly test this, but in my experiments, the contains rule for Name only works for folders that do not have a period '.' in the name. I get that this is likely to prevent hidden folders from having icons and that my naming conventions are potentially unusual. Can it only do that if it detects a period as the first character? This seems to only effect folders, not files.

[Drakemoor]

I have the same problem.