When set app:apsv_model_offset="10dp" the circles get cut by the edges of the view, the solution is in the line 827 of the ArcProgressStackView.java
Change
final float modelOffset = (mProgressModelSize * i) +
(paintOffset + shadowOffset) - (mProgressModelOffset * i);
With
final float modelOffset = (mProgressModelSize * i) +
(paintOffset + shadowOffset) + (mProgressModelOffset * i);
if you put + (mProgressModelOffset * i); works perfectly
Hope this help
Best Regards