[iOS] App crashes when navigating to a page containing a map more than once

[claytonone]

Description

Navigating to a page that contains a map more than once and then panning the map causes the app to crash with a System.InvalidOperationException 'VirtualView cannot be null here'. This only seems to be an issue on iOS and used to work fine in .net 8 maui. Unfortunately this issue is preventing us upgrading to .net 9.

Screen.Recording.2025-05-05.at.14.04.23-1.mov

Steps to Reproduce

1. Navigate to a page containing a map and pan the map
2. Go back to the previous page
3. Navigate back to the map and pan it again
4. App crashes with System.InvalidOperationException 'VirtualView cannot be null here'

Link to public reproduction project repository

https://github.com/claytonone/MAUIMapsCrash

Version with bug

9.0.60 SR6

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

8.0.100 SR10

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

No

Relevant log output

Exception has occurred: CLR/System.InvalidOperationException
* 
An unhandled exception of type 'System.InvalidOperationException' occurred in Microsoft.iOS.dll: 'VirtualView cannot be null here'
   at UIKit.UIApplication.xamarin_UIApplicationMain(Int32 argc, IntPtr argv, IntPtr principalClassName, IntPtr delegateClassName, IntPtr* gchandle)
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName)
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass)
   at MapsTest.Program.Main(String[] args)

[similar-issues-ai]

We've found some similar issues:

• [iOS] Map: Unexpected Exception When Navigating to a Page More Than Once #26559 , similarity score: 88%
• [iOS][Maps] - .Net 9 Preview 5 app crashes when loading a page with a Map in Release #23888 , similarity score: 83%
• System.InvalidCastException when using a custom map handler on iOS and .NET 9. #26000 , similarity score: 83%
• iOS map control intermittent crash #26624 , similarity score: 81%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

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[deepika2509]

This issue has been verified in Visual Studio Code 1.99.3 with MAUI versions (9.0.0 & 9.0.60). It can be reproduced on iOS platform. The issue is not reproducible in MAUI version 8.0.100.

[raselldev]

I using JetBrains Rider 2025.1, with latest nuget package of Maps, and still error: VirtualView cannot be null here

JetBrains Rider 2025.1
Build #RD-251.23774.437, built on April 15, 2025
Source revision: d76c57f8665e9
Licensed to Raka Rasell
Subscription is active until October 25, 2025.
For non-commercial use only.
Runtime version: 21.0.6+9-b895.109 aarch64 (JCEF 122.1.9)
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Toolkit: sun.lwawt.macosx.LWCToolkit
macOS 15.0.1
.NET Core v8.0.11 ARM64 (Server GC)
GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
Memory: 2048M
Cores: 8
Metal Rendering is ON
Registry:
ide.experimental.ui=true
completion.cloud.enableTextCompletion=false
llm.show.ai.promotion.window.on.start=false
Non-Bundled Plugins:
avalonia-rider (1.5.3)
com.jetbrains.rider.android (251.23774.471)
com.intellij.ml.llm (251.23774.42.28.7.1)
me.rafaelldi.aspire (1.7.10)

[sheiksyedm]

This issue fix has been moved to the main branch via candidate PR #29473