Reproduction steps:
1. Open the "UnityProject" project that is inside the attached "IN-112820.zip"
2. Open the Test Runner (Window > General > Test Runner)
3. Select EditMode
4. Search for "DynamicBufferHashMapTypeTest" and run that test
5. Observe the Test Runner

Expected Result: The test passes
Actual Result: The test fails

Reproducible with: 1.3.14 (2023.2.0a17, 6000.0.58f1), 1.4.0-exp.2 (6000.0.57f1, 6000.2.4f1, 6000.3.0b1)
Not reproducible with: 1.3.8 (2023.2.0a17, 6000.0.58f1), 1.4.0-pre.4 (6000.0.57f1, 6000.2.4f1, 6000.3.0b1)
Could not test with: 1.3.9 (2023.2.0a17, 6000.0.58f1), 1.3.10 (2023.2.0a17, 6000.0.58f1) (Cannot resolve errors with DLLs and References)
Fixed in: 1.4.0-pre.3 (6000.0.57f1, 6000.2.4f1, 6000.3.0b1)

Reproducible on: Windows 11 Pro (24H2)
Not reproducible on: No other environments tested

Workaround: Adding {{DISABLE_TYPEMANAGER_ILPP}} to your Scripting Define Symbols in Edit > Project Settings > Player > Other Settings