Extreme hitching when using profile command (stat startfile) + other stat commands

Core - Apr 19, 2018

Running the "stat startfile" command in a 4.19 project causes constant editor hitching. Running the same command in a 4.18 project does not produce any hitching by comparison. ...

Blueprint actor reference breaks after hot reload

Gameplay - Blueprint - Apr 21, 2016

Reference to a blueprint based on a custom class will break if changes are made to the parent class and a hot reload is performed. Error Displayed added to Callstack section. Workaround: Compiling ...

Unable to change/edit elements of Blueprint instances of Actor Component set UObject arrays

Gameplay - Components - Nov 20, 2016

When an array of custom UObjects is defined in an actor component class, blueprint instances of the component class cannot update the array elements. Array elements only update inside the blueprint ...

Incorrect values filled for nativized struct arrays when resized and packaged

Gameplay - Jun 4, 2018

When packaging a resized structure array it changes the array value to a large incorrect number. Testing the struct in PIE yields expected results. ...

Blueprint Macro Libraries based on Actor cannot be reparented to Object

Gameplay - Blueprint - Jul 13, 2015

Blueprint Macro Libraries based on Actor cannot be reparented to Object Reproduced in 4.7.6, 4.8.1, and Main (//depot/UE4/Promoted-CL-2605171) ...

Subcomponents of classes do not show up in BP hierarchy

Gameplay - Blueprint - May 8, 2015

If a custom component creates another component in code, the second component does not appear in the hierarchy inside the blueprint menu. It does appear in the hierarchy for an instanced version of ...

LIVE: Transform Variable rotation not setting correctly

Gameplay - Oct 21, 2014

When trying to set the rotation value of a blueprint transform variable, changing the Y value will usually reset to 0 and change the value of X and Z as well. ...

Strange Behavior of Array of Structs default values

Gameplay - Blueprint - Nov 14, 2016

When the default values of a struct are set in code and an array of the struct type are added as a class variable, creating a blueprint of the class with show array elements with the "reset defaults ...

Blueprinted class fails to instance private objects if the hosting subobject's class inherits an instanced variable

Gameplay - Blueprint - Feb 21, 2018

Blueprints that contain an instanced private object that is nested under an instanced subobject and the defaults of that blueprint are set up using EditInLineNew, any instances of the blueprint will ...

Cannot run any packaged project if "Force all skinned meshes to recompute tangents" has been enabled in an unrelated project

Core - Apr 20, 2018

Enabling the "Force all skinned meshes to recompute tangents" sets the value at a Windows user level so that it affects all UE4 projects opened by that user, including unrelated packaged projects. T ...