Strange effect on loading

Hi. The plugin works perfectly in the frontpage I’m working on, totally customized and added random display order option. Just a small but annoying side-effect happens to me: when loading the page for the first time or refreshing it, all images are loaded at the same time and displayed for a fraction of second and then all starts well according with options. It’s just like content box explodes to contain all images and then everything is ok again. Is it any suggestion to avoid this slightly strange behavior? Maybe did I change any css rule (overflow something… i.e.)? I can’t say honestly. Thanx.

https://www.ads-software.com/extend/plugins/wp-orbit-slider/