Wrongly calculated value in first repeat group when used with once function

[grzesiek2010]

Problem description

The problem has been discovered on the forum: https://forum.getodk.org/t/default-value-to-repeat-from-outside-repeat/33997/

Steps to reproduce the problem

1. Open the attached form:
   Default to Repeat.xlsx
2. Answer Current Job question
3. Navigate to the next question which should display the answer passed in step 2 but it is just the first letter of that answer

Other information

Removing once() in row 8 fixes the issue.

[lognaturel]

Were you able to reproduce without a field list? Did you try using dynamic defaults (set value) instead of once()? The goal is to have a dynamic default that is user-editable so one or the other is critical for this usecase.

At first reading it doesn’t look like a JR problem. I believe it’s because it’s hitting the field-list recomputation triggered by Collect as soon as there’s a single character. I would expect the TextWatcher stuff to only apply to user-provided content so I’m not sure how but that’s the direction I would look in.

[lognaturel]

This is working as expected because the value that is wrapped in once is in a field-list. That means it is committed to the form character-by-character.