How Do I Reset the Pose for An Envelope Deformer on a Current Keyframe? Reset Current Keyframe Doesn't Seem to Work

Exactly what the title says. In the middle of an art test and I keep running into an issue where when I go to the next frame, set a key, and animate or pose my limbs on my rig, the previous frame with the same part in camera view becomes distorted, but the deformer chain is still holding the same position. When I use the reset current frame button, nothing happens.