The new CRT Shader only applying 1/4th of it's CRT edge on Linux-Vulkan-NVIDIA

[deanrih]

Your system information

• System information from steam (Steam -> Help -> System Information) in a gist: https://gist.github.com/deanrih/72da4722d51347c6a4322f1ba3b4804b
• Have you checked for system updates?: Yes
• Are you using the latest stable video driver available for your system? No (The latest 'stable' driver have more problem in the driver)
• Have you verified the game files?: Yes

Please describe your issue in as much detail as possible:

As you can see from the screenshot below, the 'edge' of the CRT effect is somehow only present on the top left corner while the other edge appears to be missing. I don't know if this is related to my monitor setup but here's my monitor setup:

And I play Dota 2 on my main monitor (the left one) full screen at 4K.

Here's the in-game screenshot:

Steps for reproducing this issue:

1. Update Dota 2
2. Open the game
3. View the new 10-year anniversary treasure
4. Go to the CRT shader effect
5. Demo map effect
6. See the shader in action