[RMMV] LAG WITH SIMPLE CHANGE OF BACKDROP?

Hi,

I recently update from maker 2k3 to the new MV, i test for few days and when i put a parallel process event for change a backdrop of a map with 4 frames for wait, i can't see the animation like 2k3 because the lag of that simple event is amazing.

It's normally? 2k3i miss you! hahaha

Thanks for your time!