PowerClip damages the image inside

I have an image inside PowerClip. Every time I move the image a bit and stop editing the contents I notice that the earlier PowerClip area has left marks in the image. Actually it has cut a 1 pix line permanently on it.

I'm not sure if this happens only when editing PowerClips originally made with X5-version. 

A bit annoying problem anyway. It basically destroyed all the images I used in a project...