Unexpectedly entered visual mode in snippet

Describe the bug
With a custom snippet, vscode enters visual mode when [tab] is pressed (to use the snippet)
This blocks further editing until [esc] and [i] is pressed to enter insert mode again.

To Reproduce

1. Add the following custom snippet:
   ( How to use snippets: https://code.visualstudio.com/docs/editor/userdefinedsnippets )

{ // file: Buggy_Snippet.code-snippets
  "Snippet Test": {
    "prefix": "SnippetTest",
    "body": ["${1:default}", "${1}"],
    "description": "Snippet that triggers visual mode"
  },
}

2. In vscode editor, open a file and type "snippettest" and wait/trigger suggestions. Select the appeared snippet and press [tab]/[enter] to use the snippet.
3. Visual mode is triggered.

Expected behavior
Vscode should stay in insert mode.

Screenshots

Environment:

• Extension (VsCodeVim) version: 1.21.7
• VSCode version: 1.60.0
• OS: macOS Big Sur version 11.1

About VSCode:
Version: 1.60.0
Commit: e7d7e9a9348e6a8cc8c03f877d39cb72e5dfb1ff
Date: 2021-09-01T10:54:53.442Z
Electron: 13.1.8
Chrome: 91.0.4472.164
Node.js: 14.16.0
V8: 9.1.269.39-electron.0
OS: Darwin x64 20.2.0

Reproduce the issue in the VS Code editor using the provided Buggy_Snippet.code-snippets definition and the reported VSCodeVim and VS Code versions. Trace snippet expansion and the transition between insert and visual modes; done means pressing Tab or Enter to expand this snippet leaves the editor in insert mode and preserves further editing.