[Bug] Lines through BoxView (or any shape) inside CollectionView on iOS

[mrobraven]

Description

On Android, when adding BoxViews to a CollectionView, taking up the entire height of the row, it renders perfectly into one large rectangle across all of the rows. The same happens with iOS, except it has lines through it at random intervals (see the photos below).

Steps to Reproduce

1. Create a CollectionView with a Grid or RelativeLayout as the ItemTemplate
2. Add a BoxView to the Grid/RL and set it to consume the entire height of the view
3. Add random items to any supported type of System.Collection and bind the variable to the ItemSource of the CollectionView
4. See the described behaviour

Expected Behavior

The BoxViews join to form one solid box

Actual Behavior

The BoxViews join to form one solid box but the box renders with lines in random locations that change every time the collection is reloaded

Basic Information

• Version with issue: 5.0.0.2578
• Last known good version: N/A
• Platform Target Frameworks:
  • iOS: 16.4 (build 20E238)
  • Android: Android 11.0 SDK Platform 30
• NuGet Packages: (Shared) Algolia.Search, Forms9Patch, GeoHash-CSharp, MagicGradients, Plugin.CloudFirestore, Plugin.FirebaseAuth, Plugin.FirebaseStorage, Xamarin.CommunityToolkit, Xamarin.Essentials, Xamarin.Forms. (iOS) Same plus: Xamarin.Firebase.iOS.CloudMessaging, Xamarin.Firebase.iOS.Crashlytics, Xamarin.Firebase.iOS.Database.
• Affected Devices: Physical iPhone 11 Pro. Not tested with any others as of yet

Environment

Show/Hide Visual Studio info

Visual Studio Community 2022 for Mac
Version 17.6 (build 1575)
Installation UUID: e951be08-8a83-4762-a4a1-5d4c2c0e4f3a

Runtime
.NET 7.0.3 (64-bit)
Architecture: X64
Microsoft.macOS.Sdk 13.1.1007; git-rev-head:8afca776a0a96613dfb7200e0917bb57f9ed5583; git-branch:release/7.0.1xx-xcode14.2

Roslyn (Language Service)
4.6.0-3.23180.6+99e956e42697a6dd886d1e12478ea2b27cceacfa

NuGet
Version: 6.4.0.117

.NET SDK (x64)
SDK: /usr/local/share/dotnet/sdk/7.0.304/Sdks
SDK Versions:
	7.0.304
	7.0.202
	7.0.102
	7.0.100
	6.0.410
	6.0.407
	6.0.405
	6.0.403
	6.0.400
	6.0.302
	5.0.408
	5.0.405
	5.0.301
	5.0.203
	5.0.202
	5.0.103
	5.0.102
	5.0.101
	5.0.100
	3.1.426
	3.1.425
	3.1.422
	3.1.421
	3.1.420
	3.1.416
	3.1.410
	3.1.409
	3.1.408
	3.1.406
	3.1.405
	3.1.404
	3.1.403
	3.1.402
MSBuild SDKs: /Applications/Visual Studio.app/Contents/MonoBundle/MSBuild/Current/bin/Sdks

.NET Runtime (x64)
Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
	7.0.7
	7.0.4
	7.0.2
	7.0.0
	6.0.18
	6.0.15
	6.0.13
	6.0.11
	6.0.8
	6.0.7
	5.0.17
	5.0.14
	5.0.7
	5.0.6
	5.0.5
	5.0.3
	5.0.2
	5.0.1
	5.0.0
	3.1.32
	3.1.31
	3.1.28
	3.1.27
	3.1.26
	3.1.22
	3.1.16
	3.1.15
	3.1.14
	3.1.12
	3.1.11
	3.1.10
	3.1.9
	3.1.8
	2.1.23
	2.1.22

Xamarin.Profiler
Version: 1.8.0.49
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

Updater
Version: 11

Xamarin.Android
Version: 13.2.0.6 (Visual Studio Community)
Commit: xamarin-android/d17-5/a200af1
Android SDK: /Users/mswallow/Library/Developer/Xamarin/android-sdk-macosx
	Supported Android versions:
		12.0 (API level 31)
		11.0 (API level 30)
		7.1  (API level 25)
		9.0  (API level 28)

SDK Command-line Tools Version: 7.0
SDK Platform Tools Version: 33.0.2
SDK Build Tools Version: 33.0.0

Build Information: 
Mono: 6dd9def
Java.Interop: xamarin/java.interop/d17-5@149d70fe
SQLite: xamarin/sqlite/3.40.1@68c69d8
Xamarin.Android Tools: xamarin/xamarin-android-tools/d17-5@9f02d77

Microsoft Build of OpenJDK
Java SDK: /Library/Java/JavaVirtualMachines/microsoft-11.jdk
11.0.16.1
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

Eclipse Temurin JDK
Java SDK: /Library/Java/JavaVirtualMachines/temurin-8.jdk
1.8.0.302
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

Android SDK Manager
Version: 17.6.0.50
Hash: a715dca
Branch: HEAD
Build date: 2023-06-14 17:06:06 UTC

Android Device Manager
Version: 0.0.0.1309
Hash: 06e3e77
Branch: HEAD
Build date: 2023-06-14 17:06:06 UTC

Apple Developer Tools
Xcode: 14.3.1 21815
Build: 14E300c

Xamarin.Mac
Not Installed

Xamarin.iOS
Version: 16.4.0.6 Visual Studio Community
Hash: 97731c92c
Branch: xcode14.3
Build date: 2023-04-11 22:38:36-0400

Xamarin Designer
Version: 17.6.3.9
Hash: 2648399ae8
Branch: remotes/origin/d17-6
Build date: 2023-06-14 17:06:02 UTC

Build Information
Release ID: 1706001575
Git revision: d32bcc352feed2f1f54e237e23e5c375d86eaf9e
Build date: 2023-06-14 17:04:22+00
Build branch: release-17.6
Build lane: release-17.6

Operating System
Mac OS X 13.2.1
Darwin 22.3.0 Darwin Kernel Version 22.3.0
    Mon Jan 30 20:42:11 PST 2023
    root:xnu-8792.81.3~2/RELEASE_X86_64 x86_64

Screenshots

iOS:

Android:

Workaround

I tried using other shapes such as Ellipse but these did not work either. I have not found a workaround.