Docs Building blocks - Task tracker -- assigning tasks doesn't work

[bill_pier3]

I'm trying to use the new Task tracker building block feature in Google Docs.

The insert creates a 'special' task table, that has an option external to the left-upper corner of the table, "Assign new tasks from table", but it doesn't do anything -- doesn't assign any tasks from the document.  The table is completed, including assignees with Person chip.  I'm at a loss as to why the tasks in this table aren't actually getting assigned as Tasks.