lol it's not fixed. Thanks for nothing!
Nice way of "resolving" issues, though. Good work, random PR person. Gotta love Taleworlds way to approach problems. Just state they are gone and ignore them. Pro tip: don't ever call your game 'fully released' and state that problems will always be there 'because of early access'.
Anyway... modders are more competent and actually fixed it, it seems. If you found this thread through the Google search like me, check this out:
Adds the option to keep a fief after capturing it.