Saber "restarting," visually distracting.

Hello, I've been using SeeMusic for a while, and this problem has happened on and off. I'm using Windows 10. After exporting, the saber in the final video sometimes abruptly "restarts," causing it to go from one position to a completely different one the very next frame, instead of gradually and smoothly moving as it usually does. Is there a way to fix this?

This happens with any of the three saber presets included with the software.