Hello Bryan,
What we fixed is preservation of hierarchy in keywords.
There was a confusion on behavior of dc:subject and lr-hierarchicalSubject , result was you got your keywords with hierarchy but also doubled with same keywords all set to the same level.
Behavior in LightRoom is unchanged as it was fine but now C1 and PhotoMechanic get the correct hierarchy in keywords in exported images from PhotoLab.
I’ll ask for an XMP test file.
Regards,
Marie