I continue to see inconsistencies as well. I really want to use this new feature but it doesn't seem fully baked yet, for whatever reason. What is the support policy for features in "Preview"?
I'm short staffed at both organizations I work for and this would definitely reduce the load for some tasks. The Adobe apps included are actually working quite well at the moment (knock on wood) and that's a major time sink removed if we can use the App Catalog packages instead.