Unreal Engine Issues
Unreal Engine Issues
When Sequencer's Add Filter Menu>Keyed(U) is enabled, adding a Key to an actor that previously failed the Filter (had zero Keys) does not immediately include the Keyed actor in the filtered list (if fails FSequencerTrackFilter_Keyed::PassesFilter)
UE - Anim - Sequencer - Jun 25, 2025When Sequencer's Add Filter Menu>Keyed(U) is enabled, adding a Key to an actor that previously failed the Filter (had zero Keys) does not immediately include the Keyed actor in the filtered list (if ...
DataAsset blueprints have the wrong NativeClass
UE - Gameplay - Nov 18, 2025UDataAsset's constructor assumes itself to be the native class, and caches that value for use by the asset registry. However, if the data asset type is defined in a blueprint (i.e. subclassing UPrim ...
Split Struct pins cause errors when a project is converted to 4.17
UE - Gameplay - Aug 11, 2017Split Struct pins cause errors when a project is converted to 4.17. You are still unable to split struct pins even if a new variable is created for the struct. Only adding a new variable to the st ...
Changing the engine quality settings will cause the editor to crash
UE - Graphics Features - Feb 27, 2020Changing the engine quality settings to low or medium will cause the editor to crash This was tested in 4.24.3 @ CL 11590231 and doesn't occur, so this is marked as a regression. Mac Environme ...
Crash on Mac on exit.
Media Framework - Aug 17, 2020A licensee reported trouble with a crash on exit on Mac. They discovered that the file AvfMediaPlayer.cpp, on the function Open there is this piece of code:// Force the AV player to not be able to ...
Editor-only blueprints like WidgetBlueprint are not added to cooked asset registry class hierarchy
UE - CoreTech - Aug 10, 2022Both the Asset Registry and Asset Manager look for all subclasses of UBlueprintCore and use that to search for blueprint classes and construct an inheritance hierarchy. This always works in editor b ...
Switchboard Unable to Launch Multi-User Slate Server in Launcher Builds
UE - Virtual Production - Tools - Switchboard - Jan 14, 2023Switchboard is unable to launch the Multi-User Slate Server in launcher builds. This is because the default install location has "Program Files and "Epic Games" in the path (aka folders with spaces ...
Animation attributes - user defined structs containing types defined in plugins cannot be registered
UE - Anim - Runtime - Dec 18, 2023This issue is caused by us forcing user defined structs to be loaded as part of AttributeTypes::Initialize. That is called after at the ObjectSystemReady run phase during engine initialization howe ...
Packed Level Actors will create ISMs with inverted normals when a portion of static meshes have negative scales. This is apparent with two-sided materials.
UE - World Creation - Worldbuilding Tools - Feb 17, 2025Packed level actors will create ISM instances with inverted normals when the selection of meshes used to create the packed level actor contains a subset of meshes with negative scales. This is the ...
Black screen on Android devices with a Mali 400
UE - Platform - Mobile - Dec 10, 2014When using the Launch on Feature with a Mali 400 Device, the project, once locked on, will appear black on 4.6 and will crash on CL# 2375758. This error occurs on new projects. Tappy Chicken Run fi ...