Unreal Engine Issues

AISystem::RegisterBlackboardComponent being called not in all valid cases

Observed by 4.7 preview 5 user. After closed investigation it turned out he had two consequent AIController::UseBlackboard calls, which triggered a ensure failure in AISystem::UnregisterBlackboardCo ...

After upgrading a project from 4.7 to 4.8 and compiling a blueprint that casts to and pulls a variable from a widget will cause a freeze if the widget is then compiled

If the user has a project that casts to a widget to pull out a variable in a 4.7 project. This can cause a freeze after upgrading the project to 4.8 preview. This happens when the user compile the b ...

Dev Folder is referencing/being referenced by UE4_Mannequin

Basically UE4_Mannequin is causing a dev folder to show up if you add the template as a content pack. It's a few materials that are being kept there. ...

Erractic Light Component Behavior in Blueprints

You cannot PIE if you attempt to adjust the Intensity of a Light via the slider in a BP that is placed in the Level already. In addition the color slider does not stay open when editing values for ...

Dynamic point lights generate shader compile errors on HTML5

The new ES2 movable point lights look promising. Unfortunately, there seems to be an issue with them in HTML5 builds. They work great in the ES2 preview mode in the editor, but when running in an ac ...

Alt+Enter after using the "Stereo on" Command will lock the computer

With an Oculus Rift connected, if Alt+Enter is pressed after using the console command "Stereo on" in a standalone game the computer / VR headset will freeze. ...

Crash when changing the number of instances in a grouped sprite component at runtime

A crash occurs when you remove a Sprite Instance within a Paper Grouped Sprite component of an Actor BP on Event Begin Play. I was able to reproduce this crash in the binary releases of 4.11.2 and ...

MfMedia: Media playback can deadlock if started too soon after opening

Landscapes do not render on PowerVR device

When using a level with a landscape on an Android Device with a PowerVR gpu the landscape is not rendering. This was reproduced with Asset# 4719Model: Galaxy S4 GT-19500GPU: PowerVR SGX544MP3OS: 4. ...

Sequencer will not play Blendshape (Morph Target) Animations while in Realtime

An Animation Track that references a Blend Shape, Morph Target, Animation will not play when you play from Level Sequencer in Editor unless you turn off real time. Also it seems if Realtime is turn ...