[iOS] NRE after calling ViewCell.ForceUpdateSize

[VitalyKnyazev]

Description

A ListView with HasUnevenRows set to true causes NRE when view cell calls ForceUpdateSize to resize itself on iOS.
It seems to be caused by #22067 fix.

Steps to Reproduce

Launch sample project in iPhone simulator and click "Toggle description visibility" button.

Link to public reproduction project repository

https://github.com/VitalyKnyazev/MauiViewCellCrash

Version with bug

8.0.60 SR6

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI, Yes, this used to work in Xamarin.Forms

Last version that worked well

8.0.40 SR5

Affected platforms

iOS

Affected platform versions

iOS 17

Did you find any workaround?

No

Relevant log output

Object reference not set to an instance of an object.

   at Microsoft.Maui.Controls.Cell.OnForceUpdateSizeRequested()
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
   at Foundation.NSAsyncSynchronizationContextDispatcher.Apply() in /Users/builder/azdo/_work/1/s/xamarin-macios/src/Foundation/NSAction.cs:line 176
--- End of stack trace from previous location ---
   at ObjCRuntime.Runtime.ThrowException(IntPtr gchandle) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/ObjCRuntime/Runtime.cs:line 2594
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 60
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 94
   at MoneyTracker.Universal.Maui.Program.Main(String[] args) in E:\Projects\Git\Working\MoneyTrackerPro\MoneyTracker.Universal.Maui\Platforms\iOS\Program.cs:line 12

[github-actions]

Hi I'm an AI powered bot that finds similar issues based off the issue title.

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

Open similar issues:

• ListView with resizing ViewCell has strange behaviour on iOS (#8239), similarity score: 0.78
• [iOS] ListView with HasUnevenRows="true" doesn't resize dynamically (#15053), similarity score: 0.74
• ListView + DataTemplateSelector + HasUnevenRows issue on iOS (#20261), similarity score: 0.74

Closed similar issues:

• [iOS] NullReferenceException in TemplatedCell (#20606), similarity score: 0.76
• HasUnevenRows=True and Image in ItemTemplate causes InvalidOperationException (#7964), similarity score: 0.74

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