Seems the botched companion quest fix isn't working quite right.

So, let me just regale you all with what just happened. I spoke to Parvati and got the " Don't Bite the Sun" or whatever quest. So, after I got done speaking with her, I went up to the kitchen and spoke to Ellie. While I'm speaking with Ellie, I watch Parvati climb through the floor and up through the ceiling. After the conversation ends, the quest fails. So, I can only assume that while speaking to someone in the Unreliable, if Parvati is on a ladder at the time, she will happily climb through and out of the ship into Law-knows-where and botch the quest.

So yeah, be sure to finish that quest before talking to anyone else on the Unreliable.