Elevator starts descending after host migration when powered instead of ascending, making completion impossible

[Flightsage]

 

Basically as said in title, our group got 90% of the way to the top, we had a host migration, and the elevator started descending. Video was taken maybe a minute or so after the descent started so we're already significantly below 90%.

This is the SP version of the mission with a Xaku and Frost, but I can't remember who the other 2 members were pre-migration.