Required fields inside a composite are validated for empty rows when "Allowed number of values" is limited to a specific number

Problem/Motivation

Possibly a feature request instead of a bug report. We are encountering the following scenario:

1. Add a composite element.
2. Mark an individual field inside it required.
3. Limit to 3 allowed values.

The user is required to fill all three rows, instead of up to three rows.

Screenshot and sample webform:

test_composite:
  '#type': custom_composite
  '#title': 'Test Composite'
  '#required': true
  '#multiple': 3
  '#element':
    foo:
      '#type': textfield
      '#title': 'Foo (required)'
      '#required': true
    bar:
      '#type': textfield
      '#title': 'Bar (optional)'

Proposed resolution

There could be a few ways to address this. Some possible solutions:

• Fields are only validated as required for rows in a composite that are not empty.
• The "Limit" setting could work the same as "Unlimited", but the "Add another" button is hidden once the limit is reached.