Issues

• RichTextBlockOverflow chain keeps a stale layout when an InlineUIContainer child changes size after the first layout (misplaced, unpainted and ghost children)

  area/skia/text ✏️difficulty/challenging 🤯kind/bugplatform/desktop 🖥️project/layout 🧱project/text 🔤
  unoplatform/uno#25471 · Filter by author MartinZikmund opened on Oct 14, 2026

• First measure re-resolves every ThemeResource reference of a freshly entered control

  area/performance 📈area/skia ✏️area/themingdifficulty/medium 🤔kind/bugplatform/allproject/layout 🧱triage/untriaged
  unoplatform/uno#25293 · Filter by author MartinZikmund opened on Oct 11, 2026

• ScrollPresenter content gets an EffectiveViewport the size of the window instead of the scroll port (Skia)

  area/items-repeaterarea/scrollviewer ⏬area/skia ✏️difficulty/medium 🤔kind/bugproject/layout 🧱triage/untriaged
  unoplatform/uno#25292 · Filter by author MartinZikmund opened on Oct 11, 2026

• GridLengthHelper.FromPixels and FromValueAndType truncate the value to float

  area/griddifficulty/starter 🚀good first issuekind/bugplatform/allproject/layout 🧱triage/untriaged
  unoplatform/uno#25242 · Filter by author MartinZikmund opened on Oct 11, 2026
  1

• Setting Control.Template on a loaded control never applies the new template (Control.Template is missing AffectsMeasure)

  area/skia ✏️difficulty/starter 🚀kind/bugproject/layout 🧱project/styling 👔triage/untriaged
  unoplatform/uno#25217 · Filter by author MartinZikmund opened on Oct 11, 2026

• UIElement.Arrange compares the unrounded rect with the layout-rounded m_finalRect, so off-pixel-grid elements are re-arranged on every pass

  area/performance 📈area/skia ✏️difficulty/medium 🤔kind/bugplatform/allproject/layout 🧱triage/untriaged
  unoplatform/uno#25002 · Filter by author MartinZikmund opened on Oct 5, 2026

• Measure() on a detached Path, Rectangle, Image or Canvas returns a non-zero DesiredSize, but WinUI leaves it at 0,0

  area/skia ✏️difficulty/challenging 🤯kind/bugplatform/allproject/layout 🧱project/shapes-brushes 🔶triage/untriaged
  unoplatform/uno#24996 · Filter by author MartinZikmund opened on Oct 5, 2026

• A throwing EffectiveViewportChanged handler leaves a null entry in the queue and wedges layout

  area/skia ✏️difficulty/starter 🚀good first issuekind/bugplatform/allproject/layout 🧱triage/untriaged
  unoplatform/uno#24917 · Filter by author MartinZikmund opened on Oct 2, 2026
  2

• EffectiveViewportChanged reports a zero-sized viewport after an element is removed and re-added to the tree

  area/scrollviewer ⏬area/skia ✏️difficulty/medium 🤔kind/bugplatform/allproject/layout 🧱triage/untriaged
  unoplatform/uno#24901 · Filter by author MartinZikmund opened on Oct 1, 2026

• Layout rounding on Skia rounds half pixels to even instead of up like WinUI (XcpRound uses Math.Round)

  area/skia ✏️difficulty/starter 🚀kind/bugplatform/allproject/layout 🧱triage/untriaged
  unoplatform/uno#24883 · Filter by author MartinZikmund opened on Oct 1, 2026

• UserControl/Page accept and expand a ControlTemplate, while WinUI rejects it

  area/winuidifficulty/medium 🤔kind/breaking-change 💥kind/bugplatform/allproject/layout 🧱project/styling 👔
  unoplatform/uno#24689 · Filter by author MartinZikmund opened on Sep 25, 2026

• UIElement.Measure passes the parent instead of the child to OnChildDesiredSizeChanged

  area/skia ✏️difficulty/starter 🚀kind/bugplatform/allproject/layout 🧱triage/untriaged
  unoplatform/uno#24676 · Filter by author MartinZikmund opened on Sep 25, 2026
  1

• SplitView Pane Resizing Broken When PanePlacement="Right" on Skia Targets

  difficulty/medium 🤔project/layout 🧱
  Bug

  unoplatform/uno#22037 · Filter by author cricketthomas opened on Dec 7, 2025
  2

• [SkiaRenderer][Desktop] TabBar Selection and GridView Scrolling laggy when the Window is maximized

  area/performance 📈project/layout 🧱stale
  Bug

  unoplatform/uno#21713 · Filter by author DevTKSS opened on Oct 30, 2025
  5

• [Expander] Collapse behavior is not aligning with its default content removal

  difficulty/medium 🤔project/layout 🧱project/styling 👔stale
  Bug

  unoplatform/uno#21665 · Filter by author DevTKSS opened on Oct 22, 2025
  4

  

• [Skia] HD popup gets clipped out by WebView instances unlike other popups

  area/hot-reloadarea/popups 💬project/layout 🧱stale
  Bug

  unoplatform/uno#21562 · Filter by author ramezgerges opened on Oct 6, 2025
  4

  

• [ItemsRepeater] offscreen items are not rendered when they re-enter the screen

  area/items-repeaterdifficulty/medium 🤔project/layout 🧱stale
  Bug

  unoplatform/uno#21377 · Filter by author Xiaoy312 opened on Aug 28, 2025
  2

• [WASM Skia] Odd/incorrect ViewBox sizing/font rendering

  difficulty/medium 🤔kind/bugproject/layout 🧱stale
  Bug

  unoplatform/uno#20828 · Filter by author mikernet opened on Jun 19, 2025
  5

• UpdateLayout should not require XamlRoot to be set

  area/skia/lifecycle ✏️difficulty/medium 🤔kind/bugproject/layout 🧱project/navigation-lifecycle 🧬
  Bug

  unoplatform/uno#20681 · Filter by author MartinZikmund opened on Jun 3, 2025
  1

• [Skia] [Android] Navigation bar flickering

  area/skia ✏️project/layout 🧱stale
  Bug

  unoplatform/uno#20446 · Filter by author bitzi opened on May 17, 2025
  18

• Measure/Arrange occur too many times in Given_Border.When_Child_Set_Same_Reference

  difficulty/medium 🤔kind/bugproject/layout 🧱
  Bug

  unoplatform/uno#17861 · Filter by author MartinZikmund opened on Aug 6, 2024
  1

• DataTemplateSelector.SelectTemplateCore is passed a different "container" parameter on Desktop vs. WinwodwsAppSDK, Wasm, Android

  area/skia ✏️difficulty/tbdkind/bugproject/layout 🧱
  Bug

  unoplatform/uno#16589 · Filter by author christianfo opened on May 6, 2024
  2

• Setting RenderTransform on a TextBlock doesn't have any effect in XamlReader

  area/skia/stability ✏️area/skia/text ✏️area/skia ✏️area/xaml-readerdifficulty/starter 🚀kind/bugproject/layout 🧱project/text 🔤
  Bug

  unoplatform/uno#16493 · Filter by author Youssef1313 opened on Apr 27, 2024
  5

• Add support for ComboBoxHelper.KeepInteriorCornersSquare

  difficulty/medium 🤔kind/enhancementproject/layout 🧱
  Feature

  unoplatform/uno#16486 · Filter by author MartinZikmund opened on Apr 26, 2024
  5

• Align ActualWidth/ActualHeight behavior with WinUI

  difficulty/tbdkind/bugproject/layout 🧱triage/untriaged
  unoplatform/uno#16120 · Filter by author Youssef1313 opened on Apr 3, 2024
  5