jittering when applying motion effects to still images

Everytime I am applying motion effects to animate still images in Premiere I don't geet smooth motion, it jitters, (it's not the playback, as when I export it is still there), why is this happening and how can I achieve smooth like butter motion ?

Now , I am here same happes in clips when I reverse speed, even with time interpolation selected.

If anyone could help that would be much appreciated.