Reproduction steps:
1. Open project “My project (26) 2.zip”
2. Open script “Test.cs”
3. Attach debugger to Unity Editor
4. Add a breakpoint to line 21 of the script
5. Debug “TestSimplePasses()“ (either through code Editor or Unity Editor - open "Window\General\Test Runner\Play Mode" and double-click on "TestSamplePasses")
6. Observe “Test2” output

Expected result: the list is empty
Actual result: the list has elements 1 and 2

Reproducible with: 2022.2.0a16, 2022.3.3f1, 2023.1.1f1, 2023.2.0a20
Not reproducible with: 2021.3.27f1, 2022.2.0a15

Reproducible on: macOS Ventura 13.2.1 (Intel), Windows 10 (by the reporter)

Note: the list clears when the script is added to a Hierarchy