I don't want the fade of the hold keyframe when motion blur is enabled, how should I do that?
2 Answers
Motion blur is a property of the layer itself and can't be keyframed on or off so there's not a whole lot you can do to stop it; if there is motion, it will blur.
Since your movement is happening in a single frame (i.e. keyframes are set to "hold"), what I would do is split the layer (cmd+SHIFT+D) and remove the keyframes before the split on the second layer (so there's no movement to blur on that layer)...
Change shutter angle to be anything lower than 180 and issue for hold frame blur should be fixed