http://www.wowpedia.org/Stampeding_Roar_%28Bear_Form%29
Cataclysm Patch 4.1.0: Duration has been increased to 8 seconds, up from 6. The movement speed effect has been increased to 60%, up from 40% and is no longer cancelled by cancelling shapeshift form.
Наверное это означает, что до 4.1.0 баф снимался при выходе из формы.
