Unreal Engine Issues
Unreal Engine Issues
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 ...
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 ...
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 ...
Enabling Wireframe Mode along with HDR (EyeAdaptation) Visualization crashes the Editor
UE - Graphics Features - May 29, 2025In the Viewport, enabling Wireframe Mode (ALT+2) along with HDR (EyeAdaptation) Visualization crashes the Editor. I've tested different versions and this issue is not present on 5.0, but it reproduc ...
Engine no longer compiles after backporting RHI thread improvements and crash fix
UE - Rendering Architecture - RHI - Apr 24, 2025Unreal Engine 5.4 code will no longer compile after applying both the RHI improvement code changes as described in [Link Removed] and the fix for the crash described in [Link Removed]. The compilati ...
Unable to use TWeakObjectPtrs for the optional Old value for a repnotify function
UE - Foundation - Cpp Tools - UnrealHeaderTool - Oct 8, 2018A user has reported that Unreal Header Tool fails to parse a rep notify function properly when the optional parameter for the Old value is populated with a TWeakObjectPointer. Example of errors:Sev ...
MemReport does not seem to respect mesh streaming
UE - Rendering Architecture - Aug 6, 2024The function "FStaticMeshLODResources::GetResourceSizeEx(...)" does not take into account that the buffers might be emptied, due to Mesh Streaming. This causes "obj list" to report sizes larger than ...