I am aware that there were changes made to accommodate custom Primary attributes if you did not want to use the “Title” attribute.
According to the above update (New UX Improvement: Primary Attribute)"…able to have one primary attribute of your choice which will always act as the item’s name - for example in notifications, references, calendar, etc." This is however not the case for us.
All our notifications, push and email, arbitrarily contains other attributes (non-starred items) from our folders. Rarely it would use the “Title” attribute.