Unreal Engine Issues

RepLayout CompareObject should treat weakpointers with different index and serialnumber as different even if both resolve to null

When comparing Object references in RepLayout weakpointers that does not share the same index and serialnumber should be considered different even if they both resolve to null. ...

Mixed Reality HMD does not appear to respect the Start in VR boolean in a packaged game

When the Windows Mixed reality plugin is enabled and a Mixed Reality device is hooked up, packaged games start in VR (regardless of if start in VR is enabled). ...

Project configured to spawn Niagara system via Character blueprint in a Code project fails to Cook, then crashes project on open

Project configured to spawn Niagara system via Character blueprint in a Code project fails to Cook, then crashes project on open Discovered when verifying [Link Removed] (also similar to [Link Remo ...

Crash in when setting label in ChildActor (infinite loop in PECP)

In void ATestActor::OnConstruction(const FTransform& Transform) there is an infinite loop occuring in a ping pong call between the SetActorLabel and the DestroyChildActor calls. Happens in vanil ...

Datasmith & mikktspace tangent cause entities to glow with lightmaps

The steps above are reduced to their simplest expression.  I appears that several customers complained about lightmap baking resulting in glowing objects.  This typically happens on interior door fr ...

Shaped Trace by channel traces do not return true when the starting and ending point are the same

When a shaped trace by channel has a starting and ending point that is the same, it no longer returns true when overlapping an object. Regression: Yes This appears to work as expected in 4.21.2 bi ...

[Input] Switching levels destroys auto-created Input Component which breaks emitUIInteraction

We auto-create a PixelStreamingInputComponent which handles the input coming from JavaScript's emitUIInteraction. This works in a UE4 app with a single level, but it seems that if you change levels ...

Unreal crashes with an Fatal Error: Out of memory message.

Fatal error importing via Datasmith (memory allocation)

Trying to import a large Revit asset using Datasmith causes the system to use all of it's memory. Certain systems may receive a memory allocation error in the process. ...

REGRESSION: Metadata no longer import in Unreal from SKP files

The reason is simple, the actor names is not the same as the metadata name: [Image Removed] ...