Crash when selecting “Add Contactless & Chip Reader” in MockReaderUI

[Malik056]

The app crashes when selecting “Add Contactless & Chip Reader” from the MockReaderUI in the test environment.

Steps to Reproduce:
1. Launch the test app with mock mode enabled.
2. Open the MockReaderUI.
3. Tap “Add Contactless & Chip Reader”.
4. App crashes immediately with the following error.

Logs:

'NSInternalInconsistencyException', reason: 'Mock card reader should not time out during mock pairing'
terminating due to uncaught exception of type NSException
CoreSimulator 1010.10 - Device: iPad Air (5th generation) (A5840DF6-8AFB-47B0-A69B-9EE100070CE0) - Runtime: iOS 17.4 (21E213) - DeviceType: iPad Air (5th generation)

Environment:

• Device: iPad Air (5th generation) Simulator
• iOS Version: 17.4
• Square SDK Version: square_mobile_payments_sdk: ^2025.3.0
• Sandbox Application ID: Yes

[cesar-sosa-hol]

it is in native part

[tamerbader]

Hi @Malik056 ,

We were able to reproduce this issue and believe there’s a bug in iPad simulators on iOS 17.4/5 that breaks parts of MockReaderUI. It appears to be fixed in later simulator versions (we tested on iOS 18). We'd recommend trying MockReaderUI on a newer iOS version of an iPad simulator or switch to an iPhone simulator on iOS 17.4/17.5 (iPhone simulators don't seem to have the bug on any version).