Shadow opacity problems between changing scenes

hi there,
having problems with the shadow effects when scenes changes …
the shadow does not work right with the transition opacity effect when the image/scene changes …

could you/someone help please …

i have seen this problems even on http://www.extendyourweb.com/morpheus-responsive-slider/
this does not appear every time … please have a look!!!

https://wordpress.org/plugins/morpheus-slider/