Just bumping this one up - I was wondering if anyone had found a work-around?
Right, so i had a similar issue where i wanted to kind of update times being spent during sessions.
a coalesce function might do the trick to a saved property, or some other hidden value that only picks up the current time when a specific question is answered.
so 1 hidden value to store time you want to keep, if a question is answered.
1 hidden value to coalesce the first value, and a blank if the first value is blank.
so one value that's only going to capture the time at a certain condition, and then another value to capture it the first time it does with a coalesce function
i think that should do the trick more or less