I am having an issue with spring motion showing up on a simple rigged prop.  Here is what I do...

1) Drag and drop a PNG into the application, when I am prompted I select rigged prop.
2) I go into Composer and add a very basic bone chain of about five bones.
3) I go into the spring editor and add all bones starting at bone 2 to the default group.  (I start at bone 2 because I don't want it to start springing from the very first bone...)

[Note at this point the spring preview shows it to be behaving as expected.]

4) Go back to Stage Mode and select my tree, and open the 'Prop Key Editor'
5) I select bone 2 and rotate it slightly every 10 keyframes.

[Note with the Prop Key Editor open the spring effect is showing properly in real time as I rotate the bone at each keyframe.]

6) With my keyframes set up I close the Prop Key Editor
7) When I hit play the prop doesn't move at all
8) If I manually drag through the timeline I see that the rotation happens but no spring effect.

[Note if I open the Prop Key Editor again the spring effect comes back ]

I have found that with the same rig, if I keyframe the parent bone (bone 1) and just translate it around the spring animation then works fine.

Thanks

I hope this is one of the know issues with CTA5 they are trying to fix,

I have spent Hours trying to resolve this weirdness, Spring bones work fine when scrubbing through the time line but won't animate when play button is pressed
I have tried rigging my asset as a prop, as a free bone actor, messing with the Motion preferences...

I figured it was just me not knowing what I'm doing but it sounds like a real issue, perhaps I'm not going mad after all.

At one point I thought I had cracked it, but this morning after deleting the part I can't repeat it ARRR! very frustrating !
At this rate I'm gona dust off ToonBoom again
Please post again if you have any joy getting it to work or have more workarounds
Thanks

Spring bone Props - More Testing
So after More Testing this is what I have found,

A Prop rigged with spring bones will only playback in the editor if:
1. The Spring Bone Editor is Open
2. You have the Track with the spring bones on it selected
3. In :- Edit / Preferences / Motion : Simulate Spring Physics in playback is UN Checked (All other boxes are Checked)

Then hit play button - All works ok
HOWEVER - Exporting either a video or PNG sequence the spring bone effect is lost ??
Guess my jumping birdie will have to make do with a rather rigid branch for now
Thanks

Did you remember to group the bones by checking the box on the lower left?  They must be grouped in order to spring.  I'm doing this from memory but I made that mistake a few times before remembering to group. 

I think this may be the same issue as reported in an earlier post about motions made in the Prop Key Editor not rendering.

It seems if I rotate and translate the entire object from it's hot point all the motion and spring action works fine. 
If I manipulate individual bones though it doesn't seem to remember the keyframes when previewing/rendering.
Though while adding the key frames via the Prop Key Editor all the individual bone manipulations DO show the proper actions in real time.

I've not tried anything yet save for making bouncy ponytails and they react to being key framed to match the head motion.   That said I've not tried to animate individual bones in the prop.

So did you find a solution to this?