When I turned Call blocking & identification enable, loading does not stop

## Environement

- iOS 13.3, 13.4

- Devise iPhone8, iPhone11 Pro


## About my app

- My app use Call Directory Extension


- Data Flow

Fetch data from server -> Save data to Realm -> Share data to App groups -> Load data to Call Directory Extension


## Explanation

Case 1

When I install my app via testFlight, I turned Settings->Phone->Call blocking & identification enable. loading does not stop.


Case 2

After I turned Settings->Phone->Call blocking & identification disable, I turned it enable. loading does not stop.


※When I turned Call blocking & identification enable, I killed my app.

※In either case, if I delete app and reinstall it, the swith of Settings->Phone->Call blocking & identification is enabled.


I dont know whether this is os bug or application bug .

Please share What should I do.