Attempting to Open a Widget Blueprint With Animation and Timeline Panels Hidden Causes the Editor to Crash

UE - Editor - UI Systems - Nov 11, 2015

When you attempt to open a widget blueprint when you have hidden the animation and timeline panels, the editor will crash. There is a workaround: Window->Reset Layout will allow you to open the blu ...

Using Fixed Frame Rate Increases the Speed of Auto Save

UE - Foundation - Core - Oct 26, 2015

Using a lower fixed frame rate (i.e. 20fps) causes the auto save timer (when set to the default of 10) to count down in 3 seconds. Found in 4.10 Preview 2 CL 2733139. Reproduced in 4.9.2 binary an ...

Automatic Animation Compression Results in Crash

OLD - Anim - Dec 1, 2015

Using the "Automatic" option to compress animation results in crash 100% in UE4.10 but does not occur in UE4.9.2. *Regression ...

Packaging for tvOS in Distribution fails to find valid provision

UE - Platform - Mobile - Dec 8, 2016

I was unable to test this due to not having provisions available to test on for tvOS distribution. However, we have reports of the following error: "PackagingResults:Error: Error Provision not foun ...

Destructibles cannot reassign mesh in Level details panel if a Blueprint

UE - Simulation - Physics - Destruction - Dec 9, 2016

Blueprints with a Destructible Mesh component cannot have the mesh changed via the level details panel. It will not accept any new mesh via selection or dragged onto the slot. The Blueprint itself e ...

Cloth environment collisions with APEX clothing is not thread safe.

UE - Simulation - Physics - Character - Jan 17, 2017

This looks like a thread safety bug that's been in the clothing system for a very long time. Essentially a skeletal mesh component does a transform update and attempts to update the collisions of a ...

Removing a key from a Enum Map variable causes duplicate keys to remain

UE - Gameplay - Mar 3, 2017

Removing a key from a Enum Map variable causes duplicate keys to remain. It doesn't seem to happen if the removed key is the first and last key, but only with the middle keys. For example: A (Remo ...

Vulkan is crashing on S7 Mali

UE - Platform - Mobile - Mar 10, 2017

Projects packaged for Android using Vulkan are crashing on S7 Mali devices. This is not happening in 4.14. ...

Flight stick input is not read consistantly

UE - Gameplay - Input - Apr 3, 2017

When using a flight stick as a raw input device, GenericUSBController Button # blueprint events will sometimes not be registered when clicked. In local testing, this occurred roughly once for every ...

iOS movie become laggy and crashes when played in iPhone 6/6s.

UE - Platform - Mobile - Feb 24, 2017

Movie play in iOS is laggy and crashes in some movie. This issue seems to be happening when the movie is played in umg widget. Tested in 4.14.3 4.15 Dev_Mobile Latest as of 2/24 Original UDN post ...