Using Workdocs as a way to edit collaboratively

I am building a system to manage the podcast I create with one other collaborator. Each episode is an item in my Episodes board and I added a Templated Workdoc to each item to hold the episode outline. Each element of the outline (Opening, Main Topic, etc) is a column in the board and I list them in the doc using Dynamic Values.

I assumed that I would then be able to open the WorkDoc, edit the content, and have those changes roll back into the columns of the Board… but I can’t seem to edit the values that are brought in to the Doc.

Am I missing something?