check(bRenderStateCreated) fires in SendRenderDynamicData_Concurrent called from FRegisterComponentContext::Process

UE - Rendering - RHI - May 18, 2026

FRegisterComponentContext::Process() in ActorComponent.cpp iterates over SendRenderDynamicDataPrimitives and calls SendRenderDynamicData_Concurrent() on each. The existing guard checks ::IsValid(Pri ...

iOS builds fail on Windows.

UE - Platform - Mobile - Systems - May 15, 2026

Loading Windows installed iOs mobile provisioning profiles fails at start of iOS build from windows machine. This due to a recent change that attempts to load PKCS12 from mobileprovision files. Thes ...

ServerUpdateLevelVisibility called multiple times from UWorld::AddToWorld/RemoveFromWorld due to child connections

UE - Engine Scaling - Streaming - World Partition - Apr 16, 2026

A recent change to ULevelStreaming::ServerUpdateLevelVisibility ensures that this only calls APlayerController::ServerUpdateLevelVisibility once for any non-child connections ( ...

Raytraced Hair Lighting using Light Functions atlas and positions the Light function material doesn't render correctly

UE - Rendering - Features - Apr 9, 2026

Light functions don’t render on grooms when using ray traced shadows and positions in the light function material. The setup:A light (point/rect/spot) pointing to a groom hair system. The light's ...

When using the WebBrowser plugin, Korean input does not work if you type in a different input field from the one that was first used on Google.

UE - AI Workflows - UI Systems - Slate - Apr 7, 2026

In the updated search box, Korean text may not be entered initially. As a workaround, switching to another window using Alt+Tab (or activating a different window) and then returning to click the sea ...

When typing Korean in Slate using FTextInputMethodContext, characters outside a specific range are not entered

UE - AI Workflows - UI Systems - Slate - Apr 7, 2026

Descriptions After getting the below message LogTextStoreACP: Verbose: GetTextExt - From 33 to 34 A line break past that range is inserted. However, when typing Korean, the correct range is not s ...

[Enhanced Input] Edge case where bShouldBeIgnored incorrectly being reset after FlushPressedKeys is called

UE - Gameplay - Input - Apr 2, 2026

[Link Removed] From UDN, the steps for their repro case: Normal case: Frame N : AddMappingContext → bShouldBeIgnored=true → FlushPressedKeys → bDown=false Frame N+1: OS IE_Repeat arrives → ...

Chaos Fields: LS_MasterField continuously creates components every frame and never cleans them up

UE - Runtime - Deformable - Mar 25, 2026

While active and ticking, the built-in FS_MasterField actor instance continuously creates several new components every frame, which are never cleaned up until the actor is destroyed. This can happen ...

Dynamic Translucency Resolution Not Reported Correctly

UE - Rendering - Architecture - Mar 24, 2026

The dynamic translucency resolution and other dynamic resolution values were tied to the primary dynamic resolution and never updated for each type of dynamic resolution. The scaling resolution fra ...