My camera can save both DNG and a vendor specific raw format PEF I’m not sure it’s useful but if you want to research if it’s a general bug you can find files here: https://filebin.net/005fe0bioakmcuhp
DNG, PEF processed twice once using Neutral and once with the standard Pentax dcp applied. It’s really sunny here and i’m doing this whilst caring for a sick child (nothing serious) so I’ve not analysed the results. The light changes a bit unfortunately. I can do static shots with off-camera flash if it’s useful.
Edit: after looking closer at the images I see the light (and background due to wind) changes to much for the images to be useful.
Edit2: Looks like Neutral profile does some things different with PEF and DNG after all.
It’s conceivable that the PEF is a bit brighter pushing it over the edge but I doubt it as the DNG is also blown out.