Component default data can be lost for a non-nativized Blueprint class that inherits the component from a nativized parent Blueprint class.

UE - Gameplay - Blueprint - Sep 5, 2018

This is a regression that was introduced by the fix for [Link Removed]. The fix makes an invalid assumption that instances of components whose archetypes are inherited by a non-nativized child Blue ...

Project launch options flicker between available and unauthorized/locked

Tools - Aug 20, 2018

Project launch options flicker between available and unauthorized/locked Unsure what causes this, but I have hit the issue twice. Another person has also seen this on their machine. I was able to ...

'Directions are not Compatible' error on ForEachLoopWithBreak if split struct pin is disconnected from Enum type

UE - Gameplay - Blueprint - Mar 25, 2015

'Directions are not Compatible' error on ForEachLoopWithBreak if split struct pin is disconnected from Enum type. Note: If the pins are reconstructed and the resplit, the error is fixed. ...

Actor Component Replication Not Working on Dynamically Spawned Components in Blueprint

UE - Networking - Aug 7, 2018

Actor components that are spawned dynamically through Blueprint are not being properly replicated to the client.  Found in 4.20 CL# 4233996 and reproduced in 4.21 Main CL# 4258917 Unable to test i ...

Set Actor Enable Collision is not replicated

UE - Networking - Jul 14, 2015

Set Actor Enable Collision is not replicated. Reproduced in 4.7.6, 4.8.2, and Main (//depot/UE4/Promotable-CL-2619427) ...

Functions in the Level Blueprint throw a warning on PIE

UE - Gameplay - Blueprint - Mar 3, 2015

Functions in the Level Blueprint throw a warning on PIE: LogBlueprint:Warning: FMemberReference::ResolveMember (NewFunction_0) bSelfContext == true, but no scope supplied! Every function logs thi ...

Sweep on Set Actor Location is ignored for all components that aren't the Blueprint's root

UE - Gameplay - May 28, 2015

Sweep on Set Actor Location is ignored for all components that aren't the Blueprint's root. Reproduced in 4.7.6 and Main (//depot/UE4/Promotable-CL-2568226) ...

Alpha blending is done twice when using RenderOpacity of RetainerBox's parent slot

UE - Editor - UI Systems - UMG - Feb 10, 2023

Licensee reported that alpha blending is done twice in the code below, and the fix below seems to fix it. .\Engine\Source\Runtime\UMG\Private\Slate\SRetainerWidget.cpp From:const FLinearColor Compu ...

Crash in DX12 UpdateTexture2D

UE - Graphics Features - Jan 24, 2017

RHIUpdateTexture2D uses the wrong size for the per-row memcpy, which means we can't support passing in an offset within a larger image in the SrcData pointer (doing so will result in an access viola ...

The Spawn Actor from Class node's dropdown menu gets cut off when zoomed out

UE - Gameplay - Blueprint - Mar 12, 2015

The Spawn Actor from Class node's dropdown menu gets cut off when zoomed out. Reproduced in 4.7.2 binary and Main (//depot/UE4/Promotable-CL-2473270) ...