A crash in editor will result after swapping inherited SCS component names at the parent class level before loading a child class that overrides them.

Gameplay - Blueprint - Oct 26, 2018

This is an editor-only crash that's due to stack overflow/infinite recursion in UInheritableComponentHandler::FixComponentTemplateName(). We are recursively trying to rename other inherited componen ...

FObjectReplicator::ValidateAgainstState may validate against the wrong buffers

Networking - Oct 22, 2018

In 4.14, changes were introduced to share replicated state between objects on the server (Shadow State) this was done to allow sharing property comparisons to determine when objects needed to replic ...

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

Rendering - Aug 14, 2018

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 ...

[CrashReport] - TRawMessageHandler<FTargetDeviceServicePong,FTargetDeviceProxyManager>::HandleMessage()

Platform - Mobile - Jan 25, 2018

User comments:Packaging Android Crash with similar callstack fixed in 4.16: UE-44154 I verified that the repro steps in that bug do not cause a crash in 4.18.3 Similar crash on Mac: UE-50846 ...

[CrashReport] UE4Editor_CoreUObject!UStruct::IsChildOf() [class.h:373]

Gameplay - Jan 24, 2018

Comments from users:I pressed Play while having a directional light selected in-editorChanged landscape collision mip level. ...

[CrashReport] Assertion failed: FPlatformOpenGLDevice::FPlatformOpenGLDevice

Rendering - Jan 9, 2018

Comments from users:tried with -opengl4tried to start with -force-opengl instead of -opengltried to run in opengl modetried to run in opengl mode due to DX11 feature level 10.0 error. (DirectX is in ...

NetDriver time becomes unusable after long running sessions

Networking - Jan 8, 2018

This issue has been around for a long time (potentially UE3). UNetDriver::Time is a float, which is updated by accumulating Delta Time during ticks. This means the longer a game runs, and the highe ...

Points on a FRuntimeFloatCurve in an instance of a Blueprint that inherits the curve from its parent are reset when reloading the level it is in.

Gameplay - Dec 14, 2017

In this situation, a FRuntimeFloatCurve UPROPERTY is stored in an Actor Component called CurveComponent. A Blueprint of MyActor (A subclass of AActor) is created and the CurveComponent is added to t ...

Properties on a child instanced class do not appear in the UMG Bind menu

Tools - UMG - Dec 5, 2017

Currently, properties added to a native class in a derived blueprint class are not being recognized by the Bind menu on UserWidgets. The only way to make additional properties appear in this list is ...