I am aware that there appear to be some problems when running NetScore on the recently released iOS 13 operating system released by Apple. I am working on resolving these. However, in the mean time, if you can avoid upgrading to iOS13 NetScore will continue to work as you expect.
A new version of NetScore has just dropped. V2.2.1 just does a bit of tidying up and makes the app more compatible with iOS13. Download it now from the App Store