Unreal Engine Issues
Unreal Engine Issues
Child Actor components on Clients use the incorrect default values for variables that are not being replicated
UE - Gameplay - Blueprint - Aug 28, 2018When a Child Actor's class is replicated but the individual variables are not, the individual variables will use the default of the original BP class instead of the defaults that were set in the Chi ...
Nvidia Graphics Drivers cause editor menus to flicker and disappear after using the editor for an extended period of time
UE - Graphics Features - Apr 16, 2021This issue seems to be occurring on a variety of Nvidia cards. So far, I haven't seen any indication that it is affecting AMD graphics cards. The majority of the reports have indicating that the pro ...
Crash at compile time when using a VariableSet node with a local variable created by pasting a private property
UE - Framework - Blueprint - Oct 7, 2025When a property is created in this way, a local variable with a Private flag is generated. Since such a variable is generally not desirable, it would be better to remove the Private flag upon pastin ...
Certain Projects crashes on Start AR on iOS
UE - Platform - XR - Jun 11, 2025Repro rate 5/5 Project crashes on pressing "Start AR" in ARDebugCheck, on "Begin Scan" in Handheld AR Template and on "Start AR" in ARImageDetection. Issue also occurs on ARVideoSettings and ARSave ...
Parameter metadata not accessible if modified in Material Instance and then converted to CustomPrimitiveData
UE - Rendering - Architecture - Materials - Jun 24, 2026There’s a potential issue with some changes we made to UMaterialInstance::GetParameterValue (https://github.com/EpicGames/UnrealEngine/commit/8f2bebb008ba645f5938da844cd46b0925322b13). It seems as t ...
Opening a DataTable that is set to a Struct that is using a Key variable will crash the editor
Tools - Nov 3, 2015Opening a DataTable that is set to a Struct that is using a Key variable will crash the editor User Description: I'm getting this crash when using Key variable in DataTable. I was able to repro i ...
Crash when renaming assets from the Persona asset browser
Tools - Mar 3, 2015Crash when renaming assets from the Persona asset browser [Link Removed] [Link Removed] LOG IS ATTACHED ...
Possession acts differently depending on whether or not "Run as dedicated server" is checked if newly possessed pawn is spawned just before possession
UE - Gameplay - Mar 31, 2015If a player on a dedicated server attempts to possess a feshly spawned pawn, the blueprint must have an unpossess node just before the possess node to be able to possess the pawn. This is not the ca ...
SetActorLabel resets components when run outside main editor process
Tools - Mar 30, 2015Calling SetActorLabel causes an actor's components to return to default states when called from a client accessing a listen server outside of main editor process. Note: User posted code linked to ...
Turning off Apply Wind after switching tabs crashes editor
OLD - Anim - May 27, 2015In the Skeletal Mesh editor, turning Show>Clothing>Apply Wind while switching tabs causes a crash. For example, turn it on while in the Mesh tab. Switch to Animation Tab and then back to Mesh. Turn ...