It doesn't matter how rarely it occurs, this should happen at all.
There have been games as a Raider/Antagonist where we can be near close winning the Mission but something unfortunate happens, something that we cannot block,evade,attack,avoid..Host migration
Whenever a Host migration happens it resets the current mission objective from any point it is (half way, almost complete), back to where it started. This causes problems for Raiders and Antagonist
With the obvious being having the Host game crash or anything that causes his game to disconnect near the end of an Objective. Like you can put 20 minutes in on a mission, slowly trying to beat the hardest part but if a migration happens that just kills all the motivation to complete the mission.
Or as an antagonist, you can be kicking their asses, bringing Loaths house almost to destruction but if the Host intentionally leaves knowing that if he comes back the house HP will be full. Like why even bother trying to win if the next Host does the same thing, that is just straight up abusing/exploiting a game mechanic system to their favor.
Here's an example of what I'm talking about
https://www.youtube.com/watch?v=Tsu6Y39Uzb0Not saying this should be fixed immediately, but it is a problem that should be considered having a change sometime in the future.