Trigger automation not working for datestamp
We have subscription forms where preferences can be selected. When a member fills this form, a new member is created within Marketo (unless they are present already). A member can opt for any/all of 6 preferences. We would like to keep track of how many members have subscribed to each of the preferences everyday. This is done using a trigger where if data value changes from False to True for a particular preference then the datestamp is stored in another column corresponding to that preference.
Even though the preference columns work as they should, this automation doesn't seem to work since the datestamp fields are left empty. Do triggers not work for new members? Or any other reason the automation doesn't work? Thanks!