Animations performance on builds from mobile

Hi, I’m having some performance issues when running multiple animations at the same time with the built versions (I tried both web-mobile and web-desktop) from mobile browser, while the preview from creator runs fine.
I tried to inspect with chrome performance tool on remote device and I noticed that the build versions do a lot of image decodes, slowing down the animation.
I use plist packets for the animations. Do I have to manually preload them? Am I missing something?

web-mobile build performance:

Cocos creator preview performance: