I have a sim who was in the future before I installed the test version of Awesomemod, and had traveled back and forth several times with no incident. After installing the mod, I tried to send her back home, only she didn't make it and immediately upon loading the home world, the rest of her family got moodlets related to having watched her die, even though she was still in their relationships panel (greyed out as if she were a foreign sim). I know there's a new death type related to time travel, but from what I've read, it's not nearly so sudden.

I started a completely new world to try to test this out with another family. The future world loaded fine but the UI was completely blank and no sim came out of the time portal.