ok it´s a bug which costs me a lot of nerves

When you move inside the a timeline your nested state animation to quick (means that they can overlap while you moving it), it will lose the informations from the keyframed states. Means the animation is destroyed.
This happens everytime when i have a lot of stuff to adjust in a long timeline.
See example before: after: rebuild something like that and then select all of them and move the quick from left to right, and have a look at the result

Hope you can fix this in the next release, cause it´s real annoying...
THX!
Creative regards,
Tom