I donno why but the export and export preview is incorrect on my side. The tail is not moving at all.
You can see from the Preview view, the tail is moving correctly but in the export preview, the path and tail is not mapped.
Watch the exporting video cap here (I don't know why this one can't be uploaded directly here, maybe a little too large):
https://1drv.ms/u/s!AtvZrOJIVJhLxHRwzUOZw953wY25
and here is the export with path enabled:
It is using the same project I attached to this thread.