FaceFX sequencer event duration can get stale

[dpakatheman]

When a FaceFX animation is updated, any sequencer events created from the old animation will retain their initial duration. If the updated animation is shorter, this can result in the animation looping (and potentially playing the audio a second time for a fraction of a second). If the new animation is longer, it will be truncated.

This could cause difficult to diagnose chirps in the audio or truncated animations.