Describe the bug
As I have already created an issue here which directed me to create this one.

If there is a Dart string interpolation that shows an explicit map/set.

The first opening bracket is showing red and the second to last one (the last one on line 3) is showing blank.

This also happens (without the need for a restart) if you call a method in the explicit map:

And even removing the call for the method does not restore the previous colours.

To Reproduce

• Clean VSCode install (or at least uninstall dart-code.dart-code it and restart vscode)
• Install the latest pre-release (v3.87.20240402) or the latest release (v3.86.0)
• Add this to a .dart file:

class A {
  @override
  String toString() => '${ {} }';
}

• See that everything works
  
• Restart vscode
• See bug:
  

Expected behavior
Even after restarting vscode there should be no visual bugs with rainbow brackets.

Please complete the following information:

Release

Dart Code extension: 3.86.0

App: Visual Studio Code - Insiders
App Host: desktop
Version: win 1.89.0-insider

Workspace type: Dart (LSP)

Dart (3.3.3): C:\Users\usuario\.puro\shared\caches\e76c956498841e1ab458577d3892003e553e4f3c\dart-sdk
Flutter (undefined): C:\Users\usuario\.puro\envs\stable\flutter (No device)

Pre-release

Dart Code extension: 3.87.20240402

App: Visual Studio Code - Insiders
App Host: desktop
Version: win 1.89.0-insider

Workspace type: Dart (LSP)

Dart (3.3.3): C:\Users\usuario\.puro\shared\caches\e76c956498841e1ab458577d3892003e553e4f3c\dart-sdk
Flutter (undefined): C:\Users\usuario\.puro\envs\stable\flutter (No device)