CanvasScaler does not scale UI in relation to Camera Viewport Rect property size when Canvas Render Mode is set to Screen Space - Camera

Reproduction steps:
1. Open the attached project
2. Open SampleScene in the Assets/Scenes folder
3. Open Game View
4. Select Main Camera in the Hierarchy menu
5. In the Main Camera Inspector window modify the Viewport Rect component H Value in 0 - 1 decimal range
6. Observe how Canvas UI elements scale

Expected results: UI scales in relation to Camera Viewport Rect size
Actual results: UI does not scale in relation to Camera Viewport Rect size

Reproducible with: 2019.4.21f1, 2020.1.0a1, 2020.2.6f1, 2021.1.0a1, 2021.1.0a7
Not reproducible with: 2019.4.22f1, 2019.4.29f1, 2020.2.7f1, 2020.3.17f1, 2021.1.0b9, 2021.1.17f1, 2021.2.0b9, 2022.1.0a6
Could not test with: 2021.1.0a8, 2021.1.0b8 (another issue - https://issuetracker.unity3d.com/issues/viewport-rect-affects-ui-canvas-gameobjects-positions-when-canvas-render-mode-is-set-to-screen-space-camera - makes this issue untestable)