Describe the bug
v3.28.0 Places odd braces on autocompletion where there is already an existing pair

To Reproduce
Steps to reproduce the behavior:
Write some code like

Container(
  child: Padding(
    padding: EdgeInsets.all(8.0),
    child: Column(
      children: [
        
      ],
    ),
  ),
)

2. erase "all" constructor name and type, e.g. symm
3. When it prompts "symmetric" press enter to autocomplete it
4. You will see odd pair of braces like this and the cursor between them

Container(
 child: Padding(
   padding: EdgeInsets.symmetric()(8.0),
   child: Column(
     children: [
       
     ],
   ),
 ),
)

Expected behavior
No braces added because there is already a pair of them right next to the prompted code
in this case with (8.0) inside

Screenshots

Versions (please complete the following information):

• VS Code version: 1.62.2
• Dart extension version: v3.28.0
• Dart/Flutter SDK version: Dart 2.13.4 (stable), Flutter 2.2.3 (stable)