Multi-Select Matrix: A dropdown column loses focus when a dependent column appears

[JaneSjs]

T21264 - Multi-Select Matrix - A dropdown loses focus when other columns appear based on the value of column 1
https://surveyjs.answerdesk.io/internal/ticket/details/T21264

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If you test the following JSON, you'll see that focus stays within a standalone dropdown when a dependent question appears. However, in a multi-select matrix, a dropdown column loses focus when another column appears.

{
  pages: [
    {
      name: "page1",
      elements: [
        {
          type: "matrixdynamic",
          name: "question1",
          columns: [
            {
              name: "Column 1",
            },
            {
              name: "Column 2",
              visibleIf: "{row.Column 1} notempty",
            },
            {
              name: "Column 3",
              visibleIf: "{row.Column 1} notempty",
            },
          ],
          choices: [1, 2, 3, 4, 5],
        },
      ],
    },
  ],
}

2024-12-30_16-43-29.mp4