Pattern Input Mask - It is impossible to enter a specific digit after a fixed numeric part

[JaneSjs]

T22385 - Bug related to Mask:Pattern in type:text
https://surveyjs.answerdesk.io/internal/ticket/details/T22385

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The following pattern mask is enabled: A1019999. A101 is a fixed part and 9999 allows users to enter digits. However, with such an input mask, respondents cannot enter 1 as the first value:

{
  "pages": [
    {
      "name": "page1",
      "elements": [
        {
          "type": "text",
          "name": "question1",
          "maskType": "pattern",
          "maskSettings": {
            "pattern": "A1019999"
          }
        }
      ]
    }
  ]
}

2025-03-18_17-14-07.mp4

[OlgaLarina]

Need to update mask
"pattern": "A\1\0\19999"