This message is what prompted the post:
I have been investigating this issue and not found an exact match. I have found past issue with virtual attributes with display conditions and partitioning though.
I am not able to test this issue as I do not have a box that is partitioned at this time.
I would like to suggest that you post this question on the Communities to see if others have experienced this issue.
Best Regards,
xxxx
CA Technologies Support
However, since then, CA Support has been able to re-create the issue and has qualified this as a defect in 15.1