Animation problem

Hi. I’m having a problem with animations. The page works fine until I try to add an animation to an element; then, the element stops displaying. For instance, if I add an entrance animation to a column, the column doesn't appear after I refresh the page. It only loads with the animation after a second refresh. If there is another animated element further down, it doesn't show up either; after a second refresh, that one appears, but the element above it disappears. Has anyone encountered this issue and knows how to fix it?