activity bulk update via profile: loses search context

conduct an activity search, select some records and initiate a batch update via profile. after completing the updates, it should return you to the search results (as we do when conducting the same process with contact records) – but instead it returns all contact records.

I did some digging but can't seem to locate where the search criteria are getting lost in the qfKey. it doesn't happen until the final step, when the records are saved. but nothing in postProcess or it's parent suggests where that might be happening.