No strong opinion 
I think @J-N-K identified the root cause and provided a solution - don’t name any non-distribution feature “openhab-something”, those are reserved for the distribution.
I added a note in the marketplace post template:
- you can package your add-on as a JAR or KAR file. In the former case, provide a direct link to the binary ending in .jar. In the latter case, provide a direct link to a binary ending in .kar, and add the kar tag (mandatory). Don’t name any Karaf feature “openhab-something”, as the “openhab” prefix is reserved for the distribution features and has special behavior.