For anyone that comes here in the future - here's my guess on what's going on by what I can experimentally see.
Certain triggers (such as the recurrence) don't generate any meaningful data beyond what's already there (I.e. the time run) to be able to add any additional columns. Some triggers do - those will likely work, such as update to a SharePoint list item, where you will be able to extract out the list item fields.
@CCW and @CSP feel free to confirm if this is the case.
@baileychop I'm guessing you're using another trigger and might be experiencing an unrelated issue when it doesn't work?