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Make Calendar.FirstDayOfWeek and Calendar.WeekNumberRule default values deterministic

enhancement

Status: Open.

#22026 In AvaloniaUI/Avalonia;

· MrJul opened on Aug 20, 2026

·  

13.0

DatePicker and TimePicker separator alignment is affected by VerticalContentAlignment

bug

Status: Open.

#22022 In AvaloniaUI/Avalonia;

· zrt2399 opened on Aug 19, 2026

Headless: first HeadlessUnitTestSession.Dispatch intermittently throws cross-thread VerifyAccess in EnsureSharedApplication, poisoning the process [12.1.1]

Status: Open.

#22021 In AvaloniaUI/Avalonia;

· lxman opened on Aug 19, 2026

Inconsistent font rendering between Windows and MacOS / iOS

bug

Status: Open.

#22019 In AvaloniaUI/Avalonia;

· andrew-vincer opened on Aug 19, 2026

ComboBox cannot scroll to the bottom with VirtualizingStackPanel when item heights vary

bug

Status: Open.

#22013 In AvaloniaUI/Avalonia;

· zrt2399 opened on Aug 19, 2026

.NET 11 support

enhancement

Status: Open.

Enhancement

#22011 In AvaloniaUI/Avalonia;

· MrJul opened on Aug 18, 2026

·  

12.2

Linux app render thread crashes on RPiOS in X11RenderingMode.Egl

bug

Status: Open.

#22006 In AvaloniaUI/Avalonia;

· mw1920 opened on Aug 18, 2026

Measuring a TextBlock with leading-newline text and TextWrapping=Wrap hangs and leaks memory until OOM

bug

Status: Open.

#22004 In AvaloniaUI/Avalonia;

· TYTYXI-OC opened on Aug 18, 2026

TabControl leaves the focus ring after one pass: strip panel is Once with a TabOnceActiveElement outside the panel

Status: Open.

#22003 In AvaloniaUI/Avalonia;

· PulseHabour opened on Aug 17, 2026

ClipToBounds does not respect CornerRadius on ContentControl, ContentPresenter, and ExperimentalAcrylicBorder; only Border works

bug

Status: Open.

#21998 In AvaloniaUI/Avalonia;

· zrt2399 opened on Aug 17, 2026

Add ClipboardChanged event

enhancement

Status: Open.

#21992 In AvaloniaUI/Avalonia;

· amwx opened on Aug 15, 2026

Improvements for DataTranser APIs

enhancement

Status: Open.

#21991 In AvaloniaUI/Avalonia;

· amwx opened on Aug 15, 2026