Unreal Engine Issues
Unreal Engine Issues
[CrashReport] Crash on Mac due to uncaught exception 'NSRangeException' - HIToolbox!DispatchEventToHandlers()
UE - Platform - Apple - Jun 22, 2017This is a common and longstanding community crash on Mac. Users have not provided descriptions when they crash, so additional information is currently not available. A log file is attached. Call ...
StaticMeshComponents do not scale to negative value
Tools - Nov 22, 2016The scale of the component does not reach negative values like the instance of the object. However, the user is able to enter a negative number and the object correctly reflects that entered number. ...
Assets with Render in Main Pass disabled show shadow artifacts
UE - Graphics Features - Apr 18, 2016This issue was originally reported specifically for Destructibles, but it appears to affect Skeletal Meshes, and static meshes when selected. When "Render in Main Pass" has been disabled skeletal an ...
Linux Native Toolchain depends on libninfo5 which is not bundled
UE - Platform - Linux - Sep 6, 2019libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 (0x00007fc27cf4d000) bschaefer@bschaefer-Precision-T7600:bin$ ldd ./clang linux-vdso.so.1 => (0x00007ffceefe3000) libpthread.so.0 => /lib/ ...
Users can't change flags on asset entries in PSD when the asset was added via a Branch In notify
UE - Anim - Gameplay - Mar 19, 2025Assets added to a PSD via a Branch In notify can't have their flags changed within the database. When the flags (like mirror, disable, etc) are changed, they revert back to the original value when ...
GAS: RemoveReplicatedLooseGameplayTag on unadded tag causes it to be replicated
UE - Gameplay - Gameplay Ability System - Nov 17, 2022A UDN user found that calling AbilitySystemComponent->RemoveReplicatedLooseGameplayTag(TagToRemove); while the gameplay tag was not in the TagMap, will create an entry for it with count 0, see ...
Planes have a Mesh Distance field exceeds the size of the original mesh
UE - Graphics Features - Sep 20, 2017Planes have a Mesh Distance field exceeds the size of the original mesh when the value is set to 2. This behavior does not seem intended as the cube does not experience this issue when the value is ...
Grandchildren of UDataAsset are not properly registered by the Asset Manager
UE - Gameplay - Sep 19, 2017Any child class of UDataAsset (parent) will properly be picked up when the Asset Manager's Asset Base Class" field is set to the appropriate class. However a grandchild class (Child) with the same ...
Crash when a Deferred Decal (Translucent) base material has a Nanite Override (Masked Surface) Material and the mesh has Nanite + Ray Tracing enabled.
UE - Graphics Features - Ray Tracing - Aug 14, 2025A crash occurs when Nanite override material instance is used in a project with Ray tracing enabled where: 1 The Material assigned to the static mesh uses Deferred Decal / Translucent and the Nani ...
GenerateProxyMesh causes incorrect transform in ISM using Scale
UE - World Creation - Worldbuilding Tools - HLOD - Aug 20, 2019MeshVertex has been converted by component transform before being converted by instance transform. It is ( Vertex * ComponentTransform ) * InstanceTransform. I thought it has to be converted by (Ve ...