Shaders not working with D3D12 driver

First and foremost consider this:

• Only RetroArch bugs should be filed here. Not core bugs or game bugs
• This is not a forum or a help section, this is strictly developer oriented

Description

Some of the slang shaders don't appear to be working with the d3d12 driver, mainly deinterlacing, dithering, everything under misc, and ntsc, though many others appear very differently compared to the other drivers. The only exceptions appear to be many of the crt shaders (excluding royale) and most image adjustment shaders.

Other drivers are working as expected.

Expected behavior

Shaders to work the same as the other drivers (eg. d3d11, glcore, vulkan).

Actual behavior

Content appears the same as not loading any shaders at all.

Steps to reproduce the bug

1. Set driver to d3d12
2. Load any content in any core
3. Apply a shader

Bisect Results

Has been an issue since earliest version d3d12 was added, up to the latest nighly and stable releases.

Environment information

Windows 11
Nvidia RTX 3090

Reproduce the issue with the D3D12 driver on Windows 11 using the listed shader categories, then compare their output with D3D11, GLCore, and Vulkan. Done means deinterlacing, dithering, misc, NTSC, and other affected shaders visibly work rather than appearing unloaded.