exactly... it does not once you add a motion clip it will retain the last frame even if you are on 200 frames later with nothing in the timeline the only way to reset your pose and do more animation is to convert your motion clip 200 frame earlier into sample clip...
Hi Randy_Dice, This Reset key function is to reset the bone transformation for full body or selected body parts in the timeline motion track. Not resetting the data in Motion Clip. Allen Reallusion