P: 32bit TIFFs are no longer treated as raw files

Broken: LrC 12.1

Working: LrC 12.0.1

OS: Win11 22H2

GPU driver: Nvidia gameready 527.56 (disabling GPU acceleration does not resolve the issue)

32bit TIFF files (such as 3D renders, astro stacks, HDRs from third party tools, etc) are not being rendered correctly in Lightroom Classic 12.1. The bug is new in 12.1, 12.0.1 handles them correctly/as previous versions did.

Here's how 12.0.1 handles this file:

Here's the same file, with the same develop settings and export settings, from 12.1:

The highlights and shadows adjustments simply flatten the contrast of the image. Additionally, in 12.1 the white balance slider is now relative(-100 to +100) instead of absolute (showing a kelvin temp). As if 32bit TIFFs are being treated as non-raw/non-linear files or something like that?

Here's a sample TIFF: https://drive.google.com/file/d/1WvqO09WhL3QtTVw4SEaCost6ChcwKJYX/view?usp=share_link

Steps to reproduce:

1. Load any 32bit tiff, the sample file linked above will do
2. Attempt to make some adjustments, particularly the highlights/shadows sliders
3. Note that the result is not at all as expected. (also note the white balance slider is curiously not displaying a temp, but rather a relative value)