To reproduce:

1. Download attached "HDRP Test.zip" project and open in Unity
2. Open "test_scene" scene
3. Select Layout "2 by 3"
4. Open the ShaderGraph called "base_tbw"

Expected results: Nothing changes in Scene and Game view
Actual results: Lighting starts flickering between Static and Dynamic until the ShaderGraph is closed

Notes:
- This issue appears both on Windows and OSX
- Could not check lower Package versions than 5.7.2 because Project becomes corrupted
- On macOS, It flickers and on Windows, it stays static
- Could not check on Unity 2018.* because the project becomes corrupted
- Gifs are attached in Comments section for reference

Reproduced on Package version 6.5.3 and 5.7.2

Reproduced on Unity 2019.1.4f1, 2019.2.0b3 and 2019.3.0a3