Animated object not visible on playback

I’m a beginner with Harmony, and I’m trying to animate a simple bouncing ball as an exercise. There are keyframes at every bounce in my 29 frame sequence, but the object itself does not display on playback. It appears at the beginning and at the end of the playback, but not in between. Is there some preference that I must activate for it to display properly?

I think I figured it out. I was not using the “Transform” tool to move the object - rather I was using the select tool. It made all the difference! Thanks for letting me sound off. I hope this maybe helps someone else.