I've tried to add the listeners in my project and i was not able to make them work. when I checked the issues, there were many issue regarding the same, please try to take some time and look into this issue.
This behaviour is noticed in both IOS. @c19354837 please take a look into this
I'm attaching some screenshots here and also some of the related opened issues.
Screen shots
code

console

related issues in react-native-system-setting