How to reproduce:
1. Open the attached 'URP-Bug.zip' project
2. Open 'SampleScene' Scene
3. Notice that 'Default Lit Material (2)' children contain shader that sets Camera direction to color
4. Notice that 'Default Lit Material (1)' children contain shader that sets Normal Vector to color
5. Pan the viewport camera and observe 'Default lit Material (1)' and 'Default lit Material (2)' GameObjects' color changes

Expected result: Line Renderer lines' normal and tangent vectors are perpendicular to the curve's vertices and 'Default Lit Material (1)' Line Renderer's lines match 'Default Lit Material (1)' Particle System's color
Actual result: Line Renderer lines' normals are directed to the camera plane and 'Default Lit Material (1)' Line Renderer's lines do match 'Default Lit Material (1)' Particle System's color

Reproducible with: 2017.4.36f1, 2018.4.17f1, 2019.3.1f1, 2020.1.0a23

Notes:
- The issue is happening when 'Generate Lighting Data' is set in Line Renderer's component
- Screenshot describing the issue is attached in Edit