Thanks, Ingo. Yes, I’ve noticed the info about two frames, which led me to believe RT treats the file like Pentax pixel-shifted files.
I’ve tried the ED DNGs with various raw converters (an older version of Lr, darktable, C1, DxO PhotoLab2, FastRawViewer, Affinity Photo) and all of them treat those DNGs like regular raw files. The only application which crashes because of those DNGs is FastPictureViewer.