Unreal Engine Issues
Unreal Engine Issues
Build crash when enabling r.CreateShadersOnLoad=1
UE - Rendering Architecture - Shaders - Nov 10, 2025When "r.CreateShadersOnLoad" is enabled, cooking will crash due to failure to create a shader. This occurs on //UE5/Release-5.5, CL: 41545209 and //UE5/Release-5.6, CL: 45232827 ...
Project Crashes on UAIPerceptionComponent::RegisterStimulus()
UE - AI - Apr 26, 2016Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 785] Array index out of bounds: 2 from an array of size 2 Source Context: 363 return OwnerController->GetPawn(); ...
Character animations do not replicate when the character is attached to another actor
UE - Networking - Feb 10, 2015Character animations do not replicate when the character is attached to another actor. Setting the other actor to Replicate and Replicates Movement does not seem to make any difference. Reproduced ...
Overlap events do not trigger on landscapes
UE - LD & Modeling - Terrain - Landscape - Sep 24, 2015Overlap events do not fire on landscapes ...
Mac ShooterGame crashes when loading into the match with Pak files
UE - Platform - Apple - Feb 15, 2017ShooterGame crashes when loading into the match on Mac when that ShooterGame was packaged with Pak files. The ShooterGame project was created using the Unreal Engine Launcher I do not see this is ...
Tessellation not working properly on Vulkan
UE - Graphics Features - Jan 25, 2018When a user launches content examples with -vulkan tessellation will not be working. Everything tessellated will appear as if it has no tessellation. This issue is also occurring in 4.18 ...
Packed level actors and Level instances are sometimes not included in HLOD build on a World Partition Level
UE - World Creation - Worldbuilding Tools - HLOD - Mar 14, 2025Context World Partition - Hierarchical Level of Detail (HLOD) system uses custom HLOD Layers to organize large amounts of Static Mesh Actors and generate a single proxy mesh and Material. Problem T ...
"Split Struct Pin" breaks functionality of Transform Bone node
OLD - Anim - Jun 22, 2015Using the "Split Struct Pin" right click option on the rotation pin breaks the functionality of the Transform Bone node in Animation Blueprints NOTE: I noticed the Roll/Pitch/Yaw are in a differen ...
Duplicating an actor that calls a custom event from another actor receives compile error
UE - Gameplay - Blueprint - Jun 23, 2015Duplicating an actor that calls a custom event from another actor receives compile error until the node is removed and replaced. ...
Opening Gameplay Debugger while in PIE removes print string output from screen in subsequent PIE modes
UE - AI - Apr 23, 2015If a user opens gameplay debugger ( ' pressed while in PIE), all print string outputs to screen disappear, and will no longer appear during any PIE session until editor is closed and re-opened. Wo ...