I’ve had this issue before where I use animations and when the page loads it double animates. It only does it when you first load the website. I’ve had this issue on multiple sites and I can’t figure out why. It’s happening to me now on the 3rd site and I just can’t diagnose the issue. It will happen every time you clear your cache and reload the page in my experience.
This is a known issue and has to do with responsive layouts and preloading – can you remove the “show loading indicator” checkbox in the document inspector until the next update comes out?
I’m sorry – to fix this you’ll need to uncheck preload for your images in the resource library. This is caused by a conflict between image preloading and responsive layouts. (Fixed in the update coming soon).