How to reproduce:
1. Open the attached “IN-96801” project
2. In the Project tab right click on the “Test” ShaderGraph asset and select “Reimport”
3. In the Editor Toolbar go to "Assets" and select "Reimport All" from the submenu
4. Observe the Game view when the Editor reloads

Expected result: The square is displayed in the Game view
Actual result: The square is no longer displayed

Reproducible with: 2022.1.0a16, 2022.3.60f1, 6000.0.43f1, 6000.1.0b11, 6000.2.0a6
Could not test with: 2021.3.50f1, 2022.1.0a15 (Feature not present, Material subasset on ShaderGraph introduced in ShaderGraph 1.13.1)

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Note: Saving in Shader Editor window fixes the issue (either CTRL + S or the save button)