I've done several animations. In the preview mode, everything is fine. But when I export the XPUB file, two out of five of them flicker on my iOS device while on the Android side everything runs fine. If I export as a HTML5 on Firefox the first run of every animation is flickering while on Chrome doesn't. I've tried every kind of compression but the result is always the same. Due to the design of my page, I can't replace them with movies. Is there a way to understand why some work and some do not? Thanks

PS: I've already found a similar question but the answer (changing the size of canvas) didn't solve my issue.

I'd like to hide a memory game object and make it visible only after the user has pushed a certain button. When in the editing mode I can set the object to hidden and I don't see it on stage, but if I render the project the memory game turns back to visible and remains always so, despite every setting or action I could attach to it. Any hint? Thanks