Flutter

We have an app for our product that receives cable information via BLE and then saves it as a .csv file on the phone. The app is built with Flutter and generally works (on Android at least).

I'm having issues with permissions being reported as permanently denied by the permissions handler:

The permissions are granted according to the settings, but in the app this is never showing:

I'm launching the app via flutter in the terminal in xcode and it opens straight up. If I close it, the debugging session is closed and the app can not be opened again, which makes debugging this a nightmare.

I'm out of ideas and have already spent too much time trying to get an already functional app working in iOS. Is there anyone who can explain this to me or guide me in the right direction?