Unreal Engine Issues

User project crashes after changing struct

Extreme hitching when using profile command (stat startfile) + other stat commands

Running the "stat startfile" command in a 4.19 project causes constant editor hitching. Running the same command in a 4.18 project does not produce any hitching by comparison. ...

Placing a rect light in between two static meshes causes the surface to be extremely bright

Placing a rect light in between two static meshes causes the surface to be extremely bright. This will happen even though the lights settings are default. It will not happen if it is lighting just a ...

White Artifacts on the Edges Static Meshes with MSAA enabled

White artifacts will appear on the edges of static meshes with MSAA enabled. If you change to deferred shading the issue is still there however it is less noticeable. Similar to UE- Founding in ...

When a Sublevel has "Initially Loaded" set to true and "Initially Visible" set to false, the Editor will crash after exiting PIE

If you have a sub level with "Initially Loaded" set to true and "Initially Visible" set to false it will crash after exiting PIE. This issue was reported and tested in 4.20.1 (CL-4233996). It has ...

GPU Particles Don't Spawn at Correct Location When Used as Collision Event Receiver

GPU emitter doesn't spawn particles at expected location when it is an event receiver. Also disabling Interpolate Spawning in the emitter properties affect this behavior as well, making the particle ...

UCanvasPanelSlot::PostEditChangeChainProperty does not call Super function

UCanvasPanelSlot::PostEditChangeChainProperty not only does not call its Super function unless the anchor node has been set, but it calls Super:: PostEditChangeProperty instead PostEditChainProperty ...

Slight menu lag when using Vulkan on Linux

When using the UE4 Editor with Vulkan there is a slight lag when navigating through the menu options. This lag is not present when launching with OpenGL nor is it present on Windows with -vulkan.  ...

Objects with centered pivots become Actors instead of StaticMeshActors when imported via Datasmith

When selecting "affect pivot only" and choosing "center pivot" on 56 objects in 3DS Max 2019, 4 of them imported into Datasmith as Actors and not StaticMeshActors. This makes it seemingly impossible ...

No additional MipMaps Generated on UI Texture Group

In previous versions of the engine (4.21), 10 MipMaps are generated with the above repro steps. Starting from 4.22 and CLs above the editor only produces 1 MipMap with the above texture settings. T ...