How to reproduce:
1. Open a new project
2. Make sure the Memory Profiler package is added (WIndow → Package Manager)
3. Open the attached “IN-81545_build“ folder and run the Player
4. In the Editor navigate to Window → Analysis → Memory Profiler
5. Make sure the Memory Profiler is connected to the Player
6. Take a Snapshot
7. Navigate to All Of Memory and expand Unity Subsystems

Expected result: The “Unknown“ section is not seen
Actual result: The “Unknown“ is seen

Reproducible with: 1.1.0-exp.1 (2022.3.12f1), 1.1.0 ( 2022.3.41f1, 6000.0.14f1)
Not reproducible with: 1.0.0 (2022.3.12f1)
Could not test with: 0.7.1-preview.1 (2021.3.42f1) (Memory Profiler was unable to take a Snapshot)

Reproducible on: Windows 10
Not reproducible on: No other environment tested