DR v18.0 build 36 (release date 2022/07/23)
Any files rendered with Codec ProRes (either AW or KS) will not render or create the alpha channel.
Channel is visible and verified.
All files rendered are ProRes 422 HQ. All adjustments do not effect file codec or alpha.
See attached snapshot.
If functioning properly, I know several Colorist who would be happy to have this. As well as Apple ProRes renders functioning properly from DR on Win 10.
Let me know if you think this is a DR 18 issue or more underlying code/ffmpeg version.