Reproduction steps:
1. Download and extract "UaaLDemo.zip" (155.2 KB)
2. Open "UnityProject" contained UaaLDemo/uaal-example-master
3. Build the project for iOS at UaaLDemo/uaal-example-master/UnityProject/iosBuild
4. Open both.xcworkspace in UaaLDemo/uaal-example-master using Xcode
5. In project navigator navigate to Unity-iPhone/Libraries/Plugins/iOS
6. Select NativaCallProxy.h and set UnityFramework visibility to Public (right side of Xcode)
7. In project navigator select Unity-iPhone/Data
8. Set target membership from Unity-iPhone to to UnityFramework (right side of Xcode)
9. Connect a bluetooth keyboard to an iOS device
10. Deploy NativeiOSApp target to the iOS device
11. Press Init
12. Click on iOS UITextField (grey box below Quit button)
13. Try to enter some text using the keyboard

Expected result: Keyboard input is received (you can see text being entered in the grey field)
Actual result: Keyboard input is not being received

Devices tested:
iPhone 12 (iOS 14.1)
iPad Pro 12.9 1st gen (iOS 13.4.1)

Reproducible with: 2019.4.26f1, 2020.3.8f1, 2021.1.7f1, 2021.2.0a17