Example here. On Chrome and FF, it shows a bouncing ball, but on MX, it shows a static ball. No animation.
Tested on MX PC 5.0.4.500
I confirm:
No animation:
MX 5.03.4000 (stable) , Iron 57.0.3000.0 , Opera 44.0.2510.1449 , Avast 3.55.2393.596 , Vivaldi 1.8.770.56 (Stable) , Microsoft Edge 40.15063.0.0
Yes animation:
Chromiun 60.0.3079.0 (Build oficial) (64 bits) , Firefox 51.01 , Palemoon 27.3.0 (64-bit)