Bug - Snapping lost

 From:  PaQ
2120.1 
Ok, sorry if it was allready reported, or if it's 'normal' and I just miss something (I'm a bit tired ;))

I just want to create a circle, using the existing center circle 'trimmed' in the model.



but after clicking on the center snap, none off the snapping element work when I try to define the radius.



Hope it's clear enough ;)

EDITED: 4 Dec 2015 by PAQ