Describe the bug
Adding breakpoints causes some of the existing breakpoints to disappear.
I mean, I like arcades, but this feels too much 😂.

To Reproduce
Steps to reproduce the behavior:

1. Run a test with a breakpoint
2. When the tests stops at the breakpoint, try add new breakpoints

Please complete the following information:

• Operating System and version: MacOS 12.6
• VS Code version: 1.79.2
• Dart extension version: 3.66.0
• Dart/Flutter SDK version: Dart SDK version: 3.1.0-63.1.beta (beta)