After Effects: Objects not showing in the rendered Video

Hello Guys!

I created a Coinflip animation in After Effects you can check out the Animation right here (Screen-record of After Effects / https://youtu.be/2FaWyBZ2IGU )

So the problem that I have is, if I render the Animation it only shows the smoke in the End of the Flip and the whole coin is just gone you can check the Rendered Version out here ( https://youtu.be/hypbWVWasZw   )

Here is a Screenshot of all the footage (Timeline) of After Effects, is it not showing because it is parented to the Null Object?

Looking forward to your help! THANKS!