WPILIB system identification dynamic test is jittery and not smooth

Hi!
We’re trying to run the robot characterization tool according to the WPILib docs. The quasistatic tests work fine, however, the dynamic tests are very jittery and produce horrible results. Our robot is running a 2-speed 6WD West Coast Drive with 3 Neos per side. What are we doing wrong? I’m sure I left out information, so please tell me if you need to know more.

Do you have video of the described “jittery” behavior?

Tried it again to get video and it fixed itself – think it was a battery voltage issue.

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