Unreal Engine Issues
Unreal Engine Issues
SetInputMode_GameOnly + windowed mode: Win+Arrow window snapping stops working after dragging window across monitors on multi-display setup
UE - Editor - UI Systems - Slate - Jul 15, 2026When SetInputMode_GameOnly is applied on a PlayerController and the application runs in windowed mode on a multi-monitor setup, the Windows OS shortcut Win+Arrow (window snapping) stops functioning ...
UBackgroundBlur crashes at PSO creation under D3D12 SM6 when stereo rendering is enabled
UE - Editor - UI Systems - Slate - Jun 4, 2026Any Slate widget that triggers the Slate post-process blur (e.g., a UBackgroundBlur with non-zero strength) hits a fatal D3D12 CreateGraphicsPipelineState failure on first render. The fatal is funne ...
When using the WebBrowser plugin, Korean input does not work if you type in a different input field from the one that was first used on Google.
UE - Editor - UI Systems - Slate - Apr 7, 2026In the updated search box, Korean text may not be entered initially. As a workaround, switching to another window using Alt+Tab (or activating a different window) and then returning to click the sea ...
When typing Korean in Slate using FTextInputMethodContext, characters outside a specific range are not entered
UE - Editor - UI Systems - Slate - Apr 7, 2026Descriptions After getting the below message LogTextStoreACP: Verbose: GetTextExt - From 33 to 34 A line break past that range is inserted. However, when typing Korean, the correct range is not s ...
Cursor radius set via FSlateApplication::SetCursorRadius is ignored during FHittestGrid hit testing
UE - Editor - UI Systems - Slate - Mar 16, 2026The cursor radius configured through FSlateApplication::SetCursorRadius() is not respected during Slate hit testing. The radius value is correctly stored in FSlateApplication and passed into FHittes ...
Tooltips not appearing in Editor when hovering over assets due to Slate Cursor Move settings
UE - Editor - UI Systems - Slate - Feb 3, 2026User noticed that when Slate.EnableSyntheticCursorMoves is set to false the editor UI tooltips no longer display. As noted by the user, modifying Slate.CursorSignificantMoveDetectionThreshold to at ...
Incorrect geometry for OnMouseMove event on Slider with RightToLeft flow direction
UE - Editor - UI Systems - Slate - Jan 28, 2026When a slider is in RTL flow direction, and thus its position is changed, the handle is not drawn at the correct position during mouse drag. Instead, the handle draws as if the slider was not moved ...
Applying downscale causes textures to display unexpectedly on widgets
UE - Editor - UI Systems - Slate - Sep 22, 2025When applying downScale 2.0 to UI textures to reduce resolution, unintended display issues occur on widgets, such as: ・The border of box-shaped Widgets with DrawAs set to “Box” becomes thinner ・Dot ...
Crashes occur when executing MRQ while adding UMG with RetainerBox.
UE - Editor - UI Systems - Slate - Sep 9, 2025Create an asset containing a RetainerBox in UMG, then add the created UMG to the viewport using AddViewport. Running MRQ after this causes a crash. ...
Slate text layout AllowPerCharacterWrapping issue
UE - Editor - UI Systems - Slate - Aug 21, 2025Customer-reported bug in TextLayout (AllowPerCharacterWrapping): Issue seems tied to bHasTrailingText handling in TextLayout.cpp (~line 694). The remainder handling after wrap inserts an extra break ...