Hmmm… It seems that some initial values are not being calculated when you create a record via this new mech.
App formulas are calculated, the columns that are set with the data action are set - but all initial values aren’t evaluated, some are simply missed.
Columns: LineItem_Title, LineItem_Rate
Action (on the Invoices table) that creates the Line_Item row:
Create | Auto Invoicing Item
When pressing that button, there’s an initial value formula to set the title - which is dependent on values set by the action - but you can see there’s nothing being written.
The action creating the record set’s what is being created, then initial value formulas pick that up and set titles, descriptions, hourly rates, etc. based off that data; but it seems that any value written to the record by this feature isn’t “seen” by the initial value formulas.