Crash When Adding a second animation timeline after adding keys to the first

UE - Anim - Sequencer - Nov 16, 2015

If the user adds a second time line to a widget blueprint after the first has had a key frame add then the editor will crash if the curve editor is selected. ...

Crash reparenting actor component to InstancedStaticMeshComponent

UE - Gameplay - Blueprint - Sep 14, 2016

Reparenting an actor component to an instanced static mesh component causes a crash. Found on //UE4/Dev-Blueprints CL-3122712 ...

Editor Crash on Mac after creating blueprint structure

UE - Gameplay - Blueprint - May 10, 2017

Creating a blueprint structure in the content browser causes the editor to lock up and become unresponsive. ...

CLONE - Editor Crash on Mac after creating blueprint structure

UE - Gameplay - Blueprint - May 19, 2017

Creating a blueprint structure in the content browser causes the editor to lock up and become unresponsive. ...

The Toggle Comment Bubble button for Reroute nodes does not revert the comment bubble to constant visibility

UE - Gameplay - Blueprint - Nov 21, 2015

The Toggle Comment Bubble button for Reroute nodes does not revert the comment bubble to constant visibility if the bubble is set to only appear when the node is hovered over. This does not occur w ...

Assertion opening blueprint with HISMC created in 4.11

UE - World Creation - Worldbuilding Tools - Foliage - Jun 7, 2016

After project was upgraded to 4.12 opening a blueprint that contains Hierarchical Instanced Static Mesh component will result in a crash. From the log I this is the important part: Assertion faile ...

Value of Mass In Kg is multiplying in value when clicked

UE - Simulation - Physics - Jul 27, 2017

When changing the value of Mass In Kg for a child of a Skeletal Mesh Actor, the value is getting multiplied with every select, deselect, and enter press on the value. The number the value is multipl ...

TPropertyValueIterator skips TMap values when KeyType is a UStruct

UE - Foundation - Core - May 7, 2018

From https://udn.unrealengine.com/questions/431271/tpropertyvalueiterator-skips-tmap-values-when-keyt.html The property value iterator has logic where it tries to iterate over all properties in a s ...

Crash caused by Buffer Overread in TBitArray operator < function

UE - Foundation - Core - Aug 29, 2018

A licensee has reported a crash that is caused by a Buffer Overread in TBitArray's operator < function. While the licensee did not provide reproduction steps, the crash is apparent from looking at t ...

Crash on loading pre-4.20 cloth data when compute skin cache is enabled in 4.21

UE - Graphics Features - Mar 19, 2019

According to information from the licensee, the else clause was added to "FSkeletalMeshLODModel::(GetClothMappingData()" at CL 4437969 , but if it is the cloth data existing from 4.20 or earlier, it ...