I created related tables for several layers in Collector. One layer - for points - had a CreationDate field that previously was filled automatically when a new point was added. Now after adding a related table to that layer but otherwise not changing it, the CreationDate field no longer is being filled when a new point is created. I've had to add a manual Date field, which is less convenient.
I'm an amateur doing volunteer work for a conservation organization. It took me a while to figure out how to create the related tables, so perhaps I did something in that process to "disable" the CreationDate field. However, I did similar work on a polygon layer, and CreationDate works properly in that layer.
Any advice would be appreciated.