RawTherapee 5.12 on Linux Mint 22.3. Every DNG raw image from my Q2 Monochrom has a pronounced pink cast when opened in RawTherapee (see screenshot). I can easily fix the problem by desaturating, but it’s annoying to have to do that with every image.
The problem is definitely with RT, as Darktable can open the same images as B&W without any cast, but I can’t use Darktable as it doesn’t correct the distortion in the raws (which RT does), so straight lines are curved and there’s pronounced vignetting in each corner of the frame.
Did you mean to attach an example raw? And remember to declare it as creative commons license if you want people to post modified images/sidecars you can examine.