Rigidbody 2D with interpolate = cant rotate object

I heave problem with rotation object on Y axis. I heave Rigidbody 2D attached with interpolation set to interpolate ... from that moment i cant rotate via Y (when is interpolation off everythinks works fine). I use rotation + scaling to change mesh direction of my player object (run left run right). How to use rotate with interpolation on and is there any other way to change direction of 2d player (before i use -1 X scaling but i heave layers on player so that dont work now i use rotate by 180 and -1 Z scale)