[iOS] CollectionView Image flickers when application is brought back to the foreground

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a/collectionviewhelp wantedp/iOS 🍎t/bug :bug:up-for-grabs

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Descrizione

Steps to Reproduce

Run the repro by deploying the application to a physical device (I used XS)
Background the app by going to the Home screen
Wait a few seconds
Foreground the app
Notice that there is some flickering below the third image
If unable to reproduce, please try the above steps a few times.

Note that this issue seems to be specific to the 3rd image. If you change its position in the list, then the flickering will continue to happen below that image. That said, I'm not sure if this is an issue with the image renderer or that of CollectionView.

Expected Behavior

There shouldn't be visible UI changes when the application is running in the foreground.

Basic Information

Version with issue: 4.3.0.1032-nightly
IDE: VS2019

Reproduction Link

App144.zip

Guida contributor

Direzione di ricerca: Indagare perché lo sfarfallio si verifica specificamente per la terza immagine quando l'app torna in primo piano. Concentrarsi sul riutilizzo delle celle di CollectionView e sui meccanismi di caching delle immagini. Verificare se il problema è correlato al renderer dell'immagine o al layout di CollectionView.
Tech stack: csharp
Dominio: mobile
Tipo issue: Bug
Difficoltà: 2
Tempo stimato: 1-3 ore
Stato attività: Attiva
Chiarezza: Chiara
Prerequisiti: Xamarin.Forms basicsiOS debugging
Adatta ai principianti: 70