B36 Bug? Convert to default formatting does not work across different folders

If I have multiple Chapters/folders with documents in them, using “No Style”/default format, and I change the format and try to apply “Convert to default formatting” to them all at once, it does not work.

If all the documents selected are in the same folder, “Convert to default formatting works” just fine. But if the docs are in different folders, it does nothing.

Is this intentional, or is this a bug?