Good find, @robert.j.moser
This looks specific to the mobile app on your device. Can you please share the device details? Model and operating system. Also the version of the app found at the bottom of the settings menu.
We don’t see this in the web app: https://tempestwx.com/station/18705/graph/64234/rain/2
I have a pixel 3xl with Android 10 Screenshot_20200610-203303|243x500