Unreal Engine Issues

Nanite enabled Geometry Collection is not simulated by ChaosCache in package application

When using ChaosCacheManager to simulate destruction of a GeometryCollection, destruction is not simulated when Nanite is ON for the GeometryCollection. In the editor, destruction is simulated rega ...

StreamableManager completion callback can happen after being canceled in same frame

FStreamableHandle (used as part of the FStreamableManager system) has a CancelHandle function that stops it from calling any completion callbacks related to that handle (it could cancel the load req ...

UNetDriver server-side hitch results in ActorInfo->NextUpdateTime far into future

A high UWorld::Tick DeltaSeconds (i.e. GameThread hitch) results in a high UNetDriver::TickFlush DeltaSeconds. This DeltaSeconds can high (many seconds) if the hitch is long. This value then affects ...

Rect + Spot Light Anomalies when Baked with GPU Lightmass

Missing Dynamic Shadows when forcing volumetric lightmap only for static meshes

Components added in Blueprint that want initialisation are not maintained by RerunConstructionScripts

When a native component that wants initialisation is added to a Blueprint actor in the Blueprint editor, the initialisation state of this component will not be correctly preserved by RerunConstructi ...

Cursor input does not work properly in exclusive fullscreen mode on a secondary monitor

Input doesn't seem to work properly when using exclusive fullscreen mode on some monitor other than the primary monitor. This is similar to other issues we've seen in the past with the cursor being ...

DeactivateImmedaite does not properly complete the system if it's already been culled by scalability

[Link Removed] UDN user found issue. Reproduced internally with custom debug code. ...

Create a "Input Device User Mapping Schema" of some kind for PC

When you are playing a game on PC (especially local multiplayer) many developers want to change how input devices are "mapped" to different players. For example, a single player game might want the ...

Camera Shot Blend does not work when Reverse Play

Camera shot blending on Sequencer does not work when Reverse Play. If we place two cameras in a scene and just blend them by Camera Shot track in sequencer, the view point is interpolated between th ...