I was doing the Spy mission on Sedna when my Kuva Lich spawned outside of the map. You can see in the image which part of the tileset he spawned outside of. It was strange because the lich was also teleporting all over the place, and seemed to be falling over and over again. You can see the lich through the window as well, which is a little funny, but also very frustrating. The lich was able to shoot at me but I was unable to shoot at it.
https://imgur.com/a/GxPYqTq