Hi Mike Simone
Its the same problem like with SONY RAW files ( on some cams, not all of them = Ar7 I. own experience ) RC just take what Windows RAW lib can read so its not RC issue but the RAW ( Windows ) libary. in SONY case it was a issue that SECONDARY image ( preview file - stored as a JPG ) is stored next to RAW data and as its a bit diff RAW format what could be NOT decoded so it can read only the secondary data.
To solve this ask the DRONE manufacturer on updated RAW libaries for your Windows version. Or you will be forced to develop the RAW data and use them as TIF of JPGs.