Unreal Engine Issues
Unreal Engine Issues
FInstancedStruct member uproperties are not cached when "Generate Optimized Blueprint Component Data" is enabled
UE - Framework - Blueprint - Nov 18, 2025A licensee has encountered an issue where their FInstancedStruct isn't being gathered into CachedPropertyData when "Generate Optimized Blueprint Component Data" is enabled. The changes in [Link Remo ...
Instanced Actors: Moving element in editor is not undoable
UE - Engine Scaling - Mass - May 30, 2026Context Instanced Actors can be moved by unchecking Lock Instance Locations on an IAM, and double-clicking into the actor → comp → instance to select an instance. Problem Moving an IA via the giz ...
Crash when creating new projects or converting copies of old ones in Japanese
UE - Editor - UI Systems - Slate - Dec 4, 2014There's a crash in FCharacterList::GetKerning() when using the editor in Japanese that is apparently fixed in one of these three changelists: CL# 2370014, 2370050, and 2370040 But they were not ...
Blueprint 'Select' node: nodes connect to all input pins are evaluated while only one input is needed
UE - Gameplay - Blueprint - Aug 15, 2015Originally marked Won't Fix in 2017. Issue reopened on May 1, 2024. All inputs of a Select blueprint node are evaluated, even though in the end only one value is selected. This is wasteful work. ...
Replace Reference feature is not replacing textures with new selected texture
Tools - Jan 4, 2017Workaround:Open M_TableRound, move a node. Save the MaterialReopening the project seems to fix the issue Replacing the reference of the deleted table texture is rendering default material. Note T ...
[CrashReport] UE4Editor_Kismet!FBlueprintGlobalOptionsDetails::CanDeprecateBlueprint() [blueprintdetailscustomization.cpp:5127]
UE - Gameplay - Blueprint Editor - Jul 19, 2017This is a common crash affecting users in 4.15 and 4.16, affecting over 200 unique users so far. User Descriptionsattempt to import bp from example Source Context 5124 { 5125 // I ...
Renaming Parent component to same name as a component in child causes crash from child blueprint
UE - Gameplay - Blueprint - Aug 1, 2017Renaming Parent component to the same name as a component in the child blueprint causes a crash from child blueprint when you press enter. When you reopen the project from the crash, the child bluep ...
World Context node returns inaccurately in PIE/Standalone
UE - Gameplay - Blueprint - Sep 11, 2017When a blueprint function library reaches a "World Context" node, the result returned by the node is invalid / null in Standalone mode. Additionally, the node will occasionally report as invalid in ...
C++ Classes subfolders cannot be viewed in CB if Sources Panel is closed
UE - Editor - Content Pipeline - Content Browser - Sep 14, 2017When a new class is added to a subfolder, by entering the folder name in the Add C++ Class - Path field, navigating to the new subfolder doesn't work if the Content Brower's Sources Panel is closed ...
Multi-line text is not an option for arrays of text
Tools - Sep 20, 2017When using the Multi-line option for a text variable, this option is no longer present when the variable becomes an array. It is unsure if this is intended behavior or not. This issue does not appea ...