I think this is a very easy fix, but struggling if someone can chip in 2c.
For simplicity’s sake - I am illustrating as a virtual doc builder or blog. I can assemble and display a single document successfully in a repeating group.
When I try to show all documents, one after the other on a single page in a repeating group, I can get all of the appropriate sections to display and according to their sort, but the Title, which is derived from datatype 1, I can’t get to show.
Thank you for the thoughtful input. There is some interesting bits in the editor you shared. I ultimately solved the problem using a backend workflow (I have a number of defaults for each new account/project) and linking two like data types.