How to reproduce:
1. Open the attached project "profiler-shaderlab.zip"
2. In File > Build Settings, make sure that Assets/Scenes/SampleScene.unity is added to the Build
3. Build and Run
4. In the Editor, open Window>Analysis>Profiler
5. Connect the Profiler to the Player, click on the Memory module and take a sample
6. Note that Shaderlab can be seen in the sample (under Other > Rendering) and is using around 10Mb worth of memory
7. Open Window>Analysis>Memory Profiler
8. Connect the Memory Profiler to the Player, then capture and open a snapshot

Expected results: Shaderlab can be seen in the captured snapshot
Actual results: Shaderlab is not included in the captured snapshot

Reproducible with: 2019.4.10f1, 2020.1.6f1, 2020.2.0b3 (Memory Profiler 0.2.5-preview.1)
Could not test with: 2018.4.27f1 as URP is in its early preview state

Notes:
- The issue has been reproduced on Nintendo Switch and Windows Standalone