Hypotenuse node unexpectedly returns "-nan(ind)" instead of "0.0" if both values passed into the node are "0.0"

Gameplay - Blueprint - Feb 1, 2019

The Hypotenuse Blueprint node currently returns a value of "-nan(ind)" if both values passed into the node are "0.0". This result is correct based on the code that the Hypotenuse node uses, but is n ...

Audio tracks in sequencer are not silent when extended past their playback end

Sequencer - Jan 31, 2019

Audio tracks can still make noise if their tracks are extended past the end of their playback. ...

Crash occurs in PIE when an Actor calls a method in a UObject that attempts to modify an FString member of the UObject

Core - Jan 31, 2019

The Editor will crash in PIE when an Actor calls a method in a UObject that modifies some FString members in the UObject. In the Attached project, the UObject class contains two FString members and ...

Find and replace reference feature(experimental) crashes after indexing dialog

Gameplay - Blueprint Editor - Jan 30, 2019

FindInBlueprints->CacheAllBlueprints(FSimpleDelegate::CreateSP(this, &SReplaceNodeReferences::OnSubmitSearchQuery, true), EFiBVersion::FIB_VER_VARIABLE_REFERENCE);  This leads to crash. Users can b ...

Engine\Build\IOS includes an expired certificate

Platform - Mobile - Jan 2, 2019

\Engine\Build\IOS\AppleWorldwideDeveloperRelationsCA.pem is out of date. This causes a warning to appear when submitting app.  Workaround: Install latest WWDR ( https://answers.unrealengine.co ...

Static array based on an enum does not show the enum element names if a C-style cast is used with a space between the type being cast to and the enum

Core - Dec 21, 2018

A static array based on an enum does not display the enum names in Blueprints if the size of the static array uses an explicit C-style cast with a space between the type being cast to and the enum b ...

Details panel for Actor Component is blank in any Blueprint that derives from a code class using that Actor Component after the Actor Component's class name is changed

Gameplay - Blueprint - Dec 20, 2018

Changing the name of an Actor Component code class in a project results in any existing Blueprints that derive from code classes that use that Actor Component to not display the Actor Component's pr ...

Pressing ESC while on a drag operation makes drag visual to be disappeared and OnDragCancelled not to be called.

Tools - UMG - Dec 11, 2018

DragDropOperation is removed when pressing esc button. but this is skipping OnDragCancelled so it can disrupt user's UMG drag operation logic.  ...

DPI Scale Rule set to custom can cause performance issues during design time

Tools - UMG - Nov 19, 2018

When setting the DPI Scale Rule to custom and using a named slot the frame rate of the editor will drop while zooming in and out of a widget that uses the widget containing the named slot. ...

DataSmith importer is setting incorrect scale on Actors

Enterprise - Nov 16, 2018

When importing, DataSmith is assigning a scale on the actors, the option to set the import scale is no longer available in 4.21. ie: a 36" item comes in at 96" This was reported and tested in 4.21 ...