"create HDR" leads to magenta-cast image
Creating an HDR from three DNGs leads to an incredibly purple/magenta image. Originals and resulting are uploaded here:
A JPG export of the resulting HDR is attached.
Possibly a dupe of https://redmine.darktable.org/issues/11620, opening a new issue because I'm merging three DNGs instead of trying to make an HDR from a single image.