In the text of the Hospitality_Joiners quest, there is a blank line missing between the reward list and the paragraph that says that you can control the person like your own colonist. This could be easily fixed by replacing all occurrences of "[commonDescEnding] [" with "[commonDescEnding]\n\n[" in Data\Royalty\Defs\QuestScriptDefs\Hospitality\Script_Hospitality_Root_Joiners.xml.
Thanks, will check
Not necessary. This has already been fixed with the latest unstable version. But thanks anyway.