On IOS, Screen.setBrightness only works the first time

I have it set on a particular screen to set it to 75%, but if the user navigates away from that screen and sets the brightness to lower, then goes back to that screen, it will not reset the brightness.

I am on IOS 13.2, XCode 11.2.1 (11B500), and Flutter (Channel master, v1.12.4-pre.4, on Mac OS X 10.14.6 18G95, locale en-US) 