
Could be. Full file format support is hit-or-miss with newer programs – even if it can read and write the data, it may not be able to fully interpret it. Try running through *Adobe DNG Converter or converting it to a TIFF, then see if that works any better, perhaps? Also check if there’s already a “full resolution editing” suggestion on the GitHub, and if not, make one! I’m away from my computer right now, but if you find/make one, please link it here so I can also share it.
*Adobe DNG Converter is the one Adobe tool I do use since it’s 100% free and offline. It JUST converts images to “standard” DNG files or JPEGs, and I do this for iPhone ProRAWs or other unsupported images when trying to edit in Darktable. I had to make some “iPhone DNG presets” and all since ADC removes the Apple DNG-specific data, but it works well beyond that.
Okay. You’re now the second person I’ve seen to have Linux issues. It sounds like it’s much more optimized for macOS and Windows for now, as everything worked well with macOS and Windows 11 (the latter in a virtual machine via VMware Fusion) on a 16 GB M4 MacBook Air. You might just want to submit an issue for optimized Linux support. The developer’s still focusing on building out core functionality, but optimization is definitely key.