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Summary:
When I build, run and restart 2 or more apps using LocalAuthentication API, the evaluatePolicy:localizedReason:reply: method on LAContext starts returning the following error: 

Error Domain=com.apple.LocalAuthentication Code=-1004 "User interaction is required." UserInfo=0x17007e840 {NSLocalizedDescription=User interaction is required.}

The only way to fix the issue is to remove other apps using LocalAuthentication.

Steps to Reproduce:
1. Open attached sample app.
2. Build and run it on a device.
3. Tap the "Test" button in the app and authenticate using your fingerprint.
4. The app will print "SUCCESS" in console.
5. Stop the app and leave it on the device.

6. Change bundleId of the sample app.
7. Build and run the app with changed id - a second app will be installed.
8. Tap the "Test" button in the second app, authenticate with fingerprint.
9. Start the first app for the 2nd time and tap the "Test" button.
10. TouchId alert will not be shown and error with code -1004 will be printed to console.

Expected Results:
LocalAuthentication API should present TouchId alert instead of returning error code -1004.

Actual Results:
LocalAuthentication API (LAContext#evaluatePolicy:localizedReason:reply:) returns error code -1004.

Version:
iOS 8.2 [12D508]

Notes:


Configuration:
iPhone 5S, iPhone 6 Plus

Attachments:
'TouchIdTest.zip' was successfully uploaded.