Animation from Blender not playing in Aero

Hi,

There is no Aero group, so this is the closest place.  I am creating a fairly simple animation in Blender 2.9 (Mac) and exporting as an FBX.  The animation info is intact, since I loaded the file in Cheetah 3D and animation is in place.  

I am using Aero on iOS 14.4 on iPhone 11 Pro Max.

HOWEVER, I followed the information here:

https://helpx.adobe.com/aero/using/import-fbx-files-into-aero.html

 and here:

https://helpx.adobe.com/aero/using/add-animated-assets-aero.html

The animation shows up in the screen list, but will not play.

It is a simple animation, no NLA and a single track... but it does not play when I set a trigger.  I am able to create animations successfully from within aero, just not import them.  Is this a limitation, or is there a trick or step I am missing.  Thanks.