Problem with piechart animation

Hi all. I have problems with a circle animation. Did this a thousand times before - never had that kind of issue. Please look at the blue part of the piechart. It ends up semi transparent - in parts… and only in Chrome… (63.8 KB)

Ok, found a solution. Seems it has to do with the width of the circle´s stroke. Obviously the upper limit for the stroke width is that value, where you see no hole in the middle for the first time. If you raise the value from then on, you´ll get a hole again and - at least - Chrome can´t handle this. (66.3 KB)