vscode: Unexpected show snippets once enter key pressed without prefix

• VSCode Version: 1.26.1
• OS Version: macOS 10.13.6

Steps to Reproduce:

1. I have a customized user snippet file vue.json:

{
  "i18n support": {
    "prefix": "i18n",
    "body": [
      "<i18n>",
      "{",
      "\t\"zh\": {",
      "\t\t$1",
      "\t},",
      "\t\"en\": {",
      "\t\t$2",
      "\t}",
      "}",
      "</i18n>"
    ],
    "documentation": "vue-i18n support"
  }
}

1. Open a vue file, and press enter key. It will jump to a new line and show i18n snippet even I don’t type i18n prefix.

It happens when I update to the latest version. In previous version the snippet will appear only when I type i18n. Now it shows whenever I press enter. I have to disabled it.

I have searched relevant documents and questions but have no solution. Could you please view that? I will appreciate.

Does this issue occur when all extensions are disabled?: No