Shader effects disappear when the Canvas size is changed on the WebGL build

Reproduction steps:
1. Open the attached "ShaderTests.zip" project
2. Build and Run the Project on WebGL with the "SampleScene" selected (File > Build Settings> Build and Run)
3. Click on the Full-Screen button in the bottom right corner
4. Observe the Player

Expected result: The“Blur” effect is visible
Actual result: The “Blur” effect is not visible

Reproducible with: 2021.3.32f1, 2022.3.14f1, 2023.2.1f1, 2023.3.0a16

Reproducible on: Windows 11
Not reproducible on: no other environment tested

Note:

• Issue only persists with Linear Color Space selected (with Gamma Color Space selected, the “Blur” effect works as expected)
• The “Blur” effect also disappears when zooming in or out in the browser
• Not reproducible in Play Mode
• Reproducible on Chrome and Opera browsers