If an input has a side-effect (e.g. starts an animation; schedules an event; etc.), then that side-effect needs to be able to be rolled back during a replay scenario

[xaroth8088]

This is especially important in the case where the server mis-predicts an input with a side-effect, and then later receives the corrected input.

[xaroth8088]

Maybe NSM should maintain a list of when an event was scheduled, and then if we're rolling back for whatever reason and back up beyond when it was scheduled, we delete the scheduling of the event. This is working on the theory that if it's important, it'll be re-scheduled during the replay anyway.