Multi-Select Matrix with a Rating Scale column: Custom rate values aren't enabled by default

[JaneSjs]

User Issue: T14013 - Breaking change(?) in the "Multiple-Choice matrix"question in the latest release
https://surveyjs.answerdesk.io/internal/ticket/details/T14013

---

Usage scenario: a user created a Multiple-Choice Matrix with a Rating column in an older version of SurveyJS libraries (v1.9.82). The user manually defined rate items.

{
  logoPosition: "right",
  pages: [
    {
      name: "page1",
      elements: [
        {
          type: "matrixdropdown",
          name: "question2",
          columns: [
            {
              name: "Column 1",
              cellType: "rating",
              rateValues: [
                {
                  value: "item1",
                  text: "Rate Item 1"
                },
                {
                  value: "item2",
                  text: "Rate Item 2"
                },
                {
                  value: "item3",
                  text: "Rate Item 3"
                },
                {
                  value: "item4",
                  text: "Rate Item 4"
                },
                {
                  value: "item5",
                  text: "Rate Item 5"
                }
              ]
            }
          ],
          choices: [1, 2, 3, 4, 5],
          rows: ["Row 1", "Row 2"]
        }
      ]
    }
  ]
};

In v1.9.82, custom defined items appear correctly: View Demo.

However, in v1.9.98, custom defined rate items do not appear by default: View Demo.

This happens because the autoGenerate:false option was not specified for a Rating Scale column. If you disable this option in a survey JSON, custom defined items will appear (View Demo):

However, it is expected that this option will be automatically disabled in a new version of SurveyJS libraries if a Rating Scale column has custom defined items.