App Crashes on Android & iOS with Null Reference Exception When Using CameraView Inside The49.Maui.BottomSheet

[srpai746]

Description

When calling ShowAsync() on a BottomSheet object from The49.Maui.BottomSheet, the app crashes on both Android and iOS with the following error:

System.NullReferenceException: 'Object reference not set to an instance of an object.'

Stack Trace (Excerpt)

0xFFFFFFFFFFFFFFFF in Android.Runtime.RuntimeNativeMethods.monodroid_debugger_unhandled_exception  
0x1A in Android.Runtime.JNINativeWrapper._unhandled_exception  
0x1D in Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V  
...  
0xC in Android.App.SyncContext.  
0xE in Java.Lang.Thread.RunnableImplementor.Run  
0x8 in Java.Lang.IRunnableInvoker.n_Run  

Expected Behavior

The BottomSheet should open without crashing, and CameraView should function correctly inside it.

Findings

• Works fine if CameraView is placed inside a ContentPage instead of BottomSheet.
• The issue might be related to lifecycle handling, missing context, or rendering limitations inside BottomSheet.

Environment

• .NET MAUI Version: net8.0
• CameraScanner.Maui Version: 1.4.19
• The49.Maui.BottomSheet Version: 8.0.3
• Devices Tested:
  • Samsung Galaxy S23 (Android)
  • iPhone 14 (iOS)

Steps to Reproduce

1. Download the source code of sample app attached
2. Run the sample app in any Android or iOS device
3. Click on Request Camera Permission and grant permission to camera usage
4. Click on QR Code Scanner button

Expected Behavior

• The BottomSheet should open, and the CameraView should function correctly.

Actual Behavior

• The app crashes with a NullReferenceException.

Basic Information

• Version with issue: 1.4.19
• Last known good version: none

Screenshots, Attachments, Links

Source code for sample app with reproducing the issue is attached

CameraDemoApp.zip