Move/copy folder - ignores hidden

Use case:
Copy/move folder containing hidden files to another location.
Do not set show hidden files in UI.

Issue:
Hidden files in folder are not copied - instead they stay in old folder location.

Expected functionality:
While moving or copying folders copy also hidden files in contained folders - it should not depend on hidden/show UI state.

I think this is bug of pantheon files, for now I show all hidden files to prevent inconsistencies like unwanted deleted files beginning with dot.