Just tested with this one alone via Bretonnia start and the rebel has indeed spawned with just the lord again. I don't know whats going on there but maybe have a look if you have time.

Could you test this as either Bretonnia or Beastmen for me? When I was running this both the Greenskins rebellions from the early Bretonnia event and the Beastmen Brayherds I personally was spawning only had the lord in them. Going to test whether it was this specifically or a combo of mods but with the rest of my mod list active turning this off did fix the issue.

Crooked Moon first!