Ambient occlusion backing artifact

Support Materials and Textures
#1

Once i bake the ambient occlusion, i get a wrong shadow on a face.
Look at the video here:

what i do wrong?

#2

check if the object producing the shadow has any modifier set to render only.

#3

thank you for replying me, nope there is no modifier at all :frowning:

Screenshot from 2016-08-24 15-45-06.png1280×720 454 KB

#4

better if you post the file…