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() => '${ {} }';
}

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

Please complete the following information:

Release

Workspace Environment

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)

Output from 'dart info'

C:\Users\usuario\.puro\shared\caches\e76c956498841e1ab458577d3892003e553e4f3c\dart-sdk\bin\dart.exe info

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below to ensure it only contains things you're comfortable posting publicly.

General info

Dart 3.3.3 (stable) (Tue Mar 26 14:21:33 2024 +0000) on "windows_x64"
on windows / "Windows 10 Pro" 10.0 (Build 22631)
locale is en-GB

Process info

Memory	CPU	Elapsed time	Command line
331 MB	--		dart.exe
96 MB	--		dart.exe

Pre-release