Feature XHTML/self_closing_tag stopped working

I used to configure Sublime Text Emmet 'Expand HTML tag as XHTML', but it now days it suddenly stopped working. I checked my User/Emmet.sublime-settings (part of its options was coppied from Emmet/Emmet.sublime-settings)

{
    "syntaxProfiles": {
        "html": "xhtml"
    },
    "telemetry": true,
    "uid": "0c743ba0-1e6c-4fc7-a485-657edadadb59"
}

I tried to borrow emmet config from .vscode/settings.json which is working in VSCode

{
   "emmet.syntaxProfiles": {
        "html": {
            "self_closing_tag": "xhtml"
        }
    }
}

so User/Emmet.sublime-settings bacame

{
  "syntaxProfiles": {
    "html": {
      "self_closing_tag": "xhtml"
    }
  }
}

not working

I tried reinstalling Emmet for Sublime Text, still not working. (Emmet/Emmet.sublime-settings gets updated during the reinstallation, not a "syntaxProfiles" thereafter)

So any migration guide to the issue?

emmetio / sublime-text-plugin

Feature XHTML/self_closing_tag stopped working #147