Zone Discrepancy in App and Web

I noticed there is a discrepancy between the target power zone displayed in the iOS app and on the live web view.

My app reports Z1 but the live web view reports Z2. I’m guessing 136W is on the high edge of Z1 and low edge of Z2, it’s just odd they differ in the zone displayed. It’s the same workout, one screenshot from the app on my iPhone and the other from the live view on my iPad via web browser.

Interesting. We will look at that. Thanks