Unreal Engine Issues

Duplicating Level With Large _BuiltData File Results in Editor Crash

Trying to duplicate a level in the editor that has a large _BuiltData file results in a crash. In the case of the supplied test level, it is over 3 GB. Crash repros in 4.19.2 and Main (CL 4115885). ...

Subtractive Geometry Brushes All Show a + In The World Outliner

Subtractive Geometry Brushes All Show a + In The World Outliner. Works as expected in 4.19 CL# 4033788 Found in 4.20 CL# 4213847 and 4.21 CL# 4221482 This is a regression.  ...

Hierarchical Instanced Static Mesh Component Doesn't Update Instance Transforms In Standalone Window and In Packaged Game.

The Hierarchical Instanced Static Mesh Component doesn't update instance transforms in Standalone window and in Packaged game. Working as expected in 4.19 CL# 4033788 Found in 4.21 CL# 4233996 and ...

Scene Capture 2D Doesn't Capture 3D Widget If It Is Off Sceen and Capture Every Frame Is Disabled

The scene capture 2d doesn't capture a 3d widget if it starts off screen with capture every frame disabled. Found in 4.15 CL# 3450819, 4.19 CL# 4033788, 4.20 CL# 4233996, 4.21 CL# 4275031 May be r ...

Particle memory can be corrupted leading to a crash

New 'UncookedOnly' modules can incorrectly be included as a build dependency after nativization of a Blueprint asset

The new 'UncookedOnly' module type that was added in 4.24 is not visible to Blueprint nativization, and thus it does not know to exclude these module types from the generated Build.cs file when they ...

Copy/Pasting static meshes from the level into a blueprint doesn't work

It's likely that this bug has been around for quite a while. The user reports that the issue could possibly be in FCustomizableTextObjectFactory::ProcessBuffer, but this seems more like it could be ...

Niagara Crash : ExportParticleDataToBlueprint module causes buffer overrun

This buffer overrun is probably caused by the ExportParticleDataToBlueprint module does not respecting the GPUAllocation Fixed Size setting in the module. In fact, out-of-range export data is not c ...

Material Instance used textures list shows sample textures used as Input Preview Textures within Material Functions

Stateless Connect Handler's SessionId and ClientId checks not working with SteamSockets

We've had a couple of reports of the recently added session/client id checks in the StatelessConnectHandlerComponent failing when using SteamSockets. The connections fail with the "Rejecting handsha ...