Unreal Engine Issues
Unreal Engine Issues
C# UHT fails to recognize delegates declared in another class's namespace
UE - Core - Cpp Tools - UnrealHeaderTool - Dec 14, 2022Repro Rate: 3/3 This issue occurs in the live build //UE5/Release-5.1 at CL 23058290. This issue has also been regression tested against //UE5/Release-5.0 at CL 20979098 and is confirmed to be a r ...
UKismetArrayLibrary::GenericArray_Shuffle is weighted to return some results more than others
UE - Gameplay - Aug 15, 2017The implementation of UKismetArrayLibrary::GenericArray_Shuffle() will generate certain array shuffle results more often (up to three times as much) than others, rather than having a roughly equal c ...
Deadlock while cooking groom bindings
UE - Runtime - Deformable - Jul 14, 2026Hi, we are experiencing random deadlocks while cooking groom bindings. We have integrated 5.8 mutable into 5.6 and are still experimenting those deadlocks which seem due to : UE_DEPRECATED(5.4, "Th ...
Contain node for a Text Array returns wrong value when packaged
UE - Gameplay - Blueprint - Mar 13, 2023This is not a regression. Tested in the following branches and change lists:BranchChange ListResultsText compared to VariableVariable added compared to VariableText compared to Text//UE5/Release-5.0 ...
Sun is rendered badly or not showing on mobile devices.
UE - Platform - Mobile - Jan 27, 2015When you deploy the First Person Template to a mobile device, the sun will appear badly rendered or not rendered at all. Tested on iPhone5S, iPad Air, GalaxyS3 Mail, Nexus 6, iPad Air 2, Nexus 5, G ...
Renaming a variable on a Blueprint will reset that variable's value on any Child BPs
UE - Framework - Blueprint - Mar 25, 2023If a variable is renamed on a blueprint, then any child blueprints will lose their default values for that variable and reset to the parent's default value. This resetting only happens with the Chi ...
Landscape UI Elements are not visible
UE - LD & Modeling - Terrain - Landscape - Oct 4, 2016Per conversation between Gareth and Mike, it was determined the Landscape tool is in Game Mode by default. Within the Landscape Tool, all UI elements are disabled by default. This has been observed ...
FBX reimport issue with Interchange Framework
UE - Editor - Content Pipeline - Import and Export - Sep 15, 2025A licensee has reported that the following repro steps can result in a "Failed to merge bones" error:One of our Skeletal Mesh assets was imported into engine version 5.4 using an older version of th ...
Chooser Table does not support binding Gameplay Tag properties
UE - Runtime - Animation - Sep 15, 2025When using Chooser Tables, the Gameplay Tag type cannot be bound through the column header UI. Clicking a column header for a different property (ie: bool or float) correctly shows the binding popup ...
Actor instance FComponentReference to other actor instance gets nulled on other actor recompile
UE - Gameplay - Blueprint Compiler - May 21, 2024An editable FComponentReference property on an actor instance can be used to reference another actor's component in the scene. In 4.27 and earlier versions these references were retained when the ot ...