How to reproduce:
1. Create new HDRP project
2. Select Window -> Analysis -> Frame Debugger
3. Click Enable button in Frame Debug window
4. Select the 'Render Additional Shadows' draw call

Expected result: Content of Render Additional Shadows is visible in Frame Debug window
Actual result: Content of Render Additional Shadows is invisible in Frame Debug window

Reproducible with: 2018.4.12f1(4.1.0-preview)
Not reproducible with: 2019.2.12f1(6.9.0, 6.9.2), 2019.3.0b10(7.0.1, 7.1.2), 2020.1.0a12(7.0.1, 7.1.2)
Could not test: 2017.4.34f1 because HDRP is not introduced

Notes:
- Not reproducible with built-in pipeline
- Not reproducible on Windows