As mentioned in a previous article, once you upload your ride files to the Lezyne Root site, an algorithm runs to correct any discrepancies in the recorded elevation. This algorithm is based on topographical survey data and is similar to how Strava treats files on their site.
We do offer the ability to disable the correction from the Lezyne Root website interface. When disabled, the data on the ride page will show the raw barometer data.
Here's an example of the default:
And here's an example of it disabled:
As you can see, my starting elevation changed a little (as well as some overall gain). I likely didn't wait long enough for GPS to calibrate the barometer before I started my ride, but the correction fixed that.
Note: this is only temporary; the ride will always default to the correction.