Unreal Engine Issues

Editor Dirty flag not updated in Windows task bar until focus is returned

A Blueprint marked Dirty will appear in the Windows Task Bar with an asterisk beside its name. Saving this Blueprint will remove the Dirty flag, but the Task Bar will continue to show the BP as Dirt ...

Re-importing JSON File Causes a Blank Editor Window Until the Asset is Reopened

Re-importing a JSON file causes the asset window to be cleared out until the file is reopened in the editor. ...

Set Sound Mix Class Override still Playing Sounds in Certain Conditions

When using the Set Sound Mix Class Override within blueprints, the playback of any subsequent sounds seems offset or incorrect. This is apparent when using a Delay node. ...

Curve editor (UMG) prevents Play in Editor if the a drag operation is interrupted with a right click

Curve editor (UMG) prevents Play in Editor if the a drag operation is interrupted with a right click. The user is given an error that they cannot play in editor while a drag operation is still on go ...

Editor Crash when adding element to TMap with FIntVector key

Declaring a TMap with an FIntVector key (ex: TMap<FIntVector, int32>) will cause the editor to crash when adding an element to the map. ...

Material Preview for Post Process Material Does not display in Material Editor

In the Material editor for when working with a Post Process Material, the material does not appear in the preview window. Regression: This issue does not occur in 4.15.2 Binary Builds ...

Welcome to the Unreal Editor Tutorial refers to World Outliner Panel as the Scene Outliner Panel

Scene Outliner might be an old name for the World Outliner panel. The hyperlink refers to SceneOutliner, but the heading on the HTML page and the wording on the panel in UE4Editor refer to "World Ou ...

ShooterGame Crashes on Exit on iOS Due to Exhausting Real Time Allowance

When closing ShooterGame on an iOS device, the application crashes due to "exhausting the real time allowance of 5.00 seconds". This issue is NOT a regression for //UE4/Dev-Networking as it is also ...

Post process material UV bug when constraining the aspect ratio

Flickering artifacts are rendered when using Sky Atmosphere Component with Vulkan

Rendering the SkyAtmopshere component using Vulkan with and without Vulkan (SM5) enabled causes artifacts to appear on screen on Windows and Linux.  This was reported and tested in 4.25.1 (CL-135 ...