Description
Attached multi package project contains 25 tests. After running either Dart: Run All Tests or tapping the test panels' Run Tests button, the count of tests shows 12. Which looks like the same count as the last package ran

To Reproduce

1. Open attached reproducing project
2. run Dart: Run All Tests command
3. See the testing panel output

Expected behavior
See the total count of passing tests 25

Screenshots

seeCountChange.mov

Versions (please complete the following information):

• VS Code version: 1.62.1
• Dart extension version: v3.28.0
• Dart/Flutter SDK version: 2.5.3 stable

Project to reproduce:
repro_workspace.zip