Hi Eric,
The new Prokit update (4.5) in combination with Motion 3.0.2 seems to be fixing this problem for many people, but sometimes a complete re-install of Motion (and perhaps even Compressor) is required.
Check this troubleshooting list for the infamous Ozone bug:
[
applemotion.net]
The methods described in the article can seem scary, if you have any questions or doubts on how you should proceed feel free to come back here and we will help you through this.
Best wishes
Ronny