When an Owner/Expert is changed the Edit rights are not transferred until the process is Published. This is an issue when the process is not ready to be Published and it is in an Unpublished status.
Why can't the Edit rights happen as soon as the Owner and/or Expert is amended?
Also normal users can only view the published process - changing the owner/expert right away would either:
1. Have the old owner listed on the published version but actually it's a different person.
or
2. Changing the owner without an increase in the version number could be confusing for auditing/change log history.
Hopefully this reasoning makes sense. Thanks for getting in touch.