ES1 Volumetric Measurements Adjustments

Just pulled my first few shots with my ES1 (using the default Arc Modern profile), and it stops wayyyy early, like 17 seconds at just 20g.

The profile says it's supposed to do a 10 second pre-infusion and 20 second infusion. But it stops at just 20g after just 10+7 seconds of infusion. 16g shy seems like a lot. Is that much of an adjustment expected to be required?

Going off of Fellow's documentation here: https://help.fellowproducts.com/hc/en-us/articles/46995762999707-Volumetric-Dosing-on-Series-1