Relationship resets on dropping a commission might involve behavior that's unpredictable or somewhat illogical (e.g. if you committed random acts of piracy or war crimes, you probably shouldn't be forgiven just because you left your current employer), so if I examine the matter again I might have to do some thinking/coding for it.
...Well, a straight 'revert to before commission was taken' rule is at least simple and most of the needed code should already be in place, so I might well do that next version.
When the brawl quest via Dissonant fails and is retried the fleet you're supposed to follow doesn't spawn. It's also not possible to abort the quest. So right now my save is broken for that questline.
It's not intended to even be possible to retry the mission without devmode (although I didn't do anything to prevent it, either), so I'm surprised that much worked. I might look into it at some point.
Are fleets that are following you after you use the "Follow Me" command not supposed to assist you when you engage enemies? I've been engaging enemy fleets while being followed and they never jumped in to help. Went against my expectations.
Try the file linked in
this post and see if that fixes it.