Animations appear split second later in animation than static items.

I'm a complete beginner, so forgive me if I describe this poorly. I made a simple animation with rotating gears in Adobe Animate. I also added some static items. My hope was to export this as an animation that could play on loop on PowerPoint presentation slides and in a social media toolkit made for Canva. However, the static items seem to be appearing a split second before the actual animation, so the animation won't loop without the gears disappearing for a split second before resuming. Is there something I can adjust to make this a true looping animation?