Steps to repro:
1. Open the attached project and SampleScene scene;
2. In the Hierarchy select Cube gameobject;
3. In the Lighting window (Window>Rendering>Lighting) press Generate Lighting button;
4. When the GI is baked in the Scene view expand the Editor draw modes dropdown and select Texel Overlap;
5. Observe that the cube is green, meaning that the Texal Validity is rendered correctly;
6. Save the scene;
7. Restart Editor;
8. Expand the Editor draw modes dropdown and select Texel Overlap;
9. Observe the Cube.

Expected result:
Cube is green.

Actual result:
Cube is black. Texel Validity is not rendered after restarting Editor. See attached video.

Workaround is to rebake GI in Editor.

Notes:
- Reproducible in Versions 2022.2.0a3, 2022.1.0b6, 2020.3.27f1;
- Reproducible on Windows;
- Reproducible in built-in RP, URP and HDRP;
- Also reproducible for UV Charts and UV Overlap draw modes.