Cannot Delete Event Dispatcher inside of a child blueprint when the parent has an event dispatcher as well

UE - Gameplay - Blueprint - Apr 2, 2015

If the user creates two blueprints and parents one to the other and then creates 3 event dispatchers in total between the two in an alternating method it will cause and error and the event dispatch ...

User cannot undo the automatic changing of Mobility settings

Tools - Sep 12, 2016

When the users causes a component to automatically change its Mobility setting by changing that setting on a parent or child component, undoing that change only affects the manual change caused by t ...

Building lighting fails on Linux

UE - Platform - Linux - Jan 15, 2016

When building lighting on Linux, the build process fails because UnrealLightmass cannot find the library libUnrealLightmass-Serialization.so. Reported using Mint Cinnamon 17.3 Internal machine uses ...

Refraction breaks Translucent Sort Order without Separate Transparency Enabled

UE - Graphics Features - Jan 6, 2016

With multiple Translucent Material sorted in 3-D space or via Transparency Sort Priority, if one of the materials uses refraction it will render on top of the others no matter position or sort prior ...

changing physics type to simulated causes bodies to simulate in phat

UE - Simulation - Physics - Jan 18, 2017

1. open qa game 2. open a physics asset with multiple bodies 3. select a body and set its physics type to Simulated. 4. Notice simulation starts immediately even though we are not simulating. ...

Ensure triggered when exiting PIE with dedicated server options

UE - Networking - Mar 22, 2017

When "Use Single Process" and "Use Less CPU when in Background" are checked off, running a dedicated server in PIE will cause an ensure on exit Regression: Yes - Behavior does not occur in binary 4 ...

Scene Capture 2D Invisible When Mobile MSAA Enabled

UE - Platform - Mobile - Oct 11, 2017

UDN Licensee (UE4.16) changed rendering settings from MSAA "none" to MSAA x4, resulting in Scene Capture 2D not showing up in mobile preview mode. I have reproduced same results in 4.17 and 4.18. ...

Literal Gameplay Tag Container's Return Value does not have ParentTags

UE - Gameplay - Oct 16, 2017

Literal Gameplay Tag Container's Return Value does not have ParentTags in 4.17 and 4.18. In 4.16, the value had it. There is same problem in Return node that is Gameplay Tag Container Structure. In ...

[Landscape] Collision Object Type Requires WorldStatic to Paint Foliage

UE - World Creation - Worldbuilding Tools - Foliage - Feb 27, 2018

No longer able to paint foliage when new Collision Object Type is applied to the landscape. Reproduced in 4.17.2 CL 3658906, 4.18.3 CL 3832480, and 4.19 P5 3898826 ...

Crash enabling Stochastic Rect Light with Ray Tracing

UE - Graphics Features - Lumen - Oct 13, 2020

Enabling Stochastic Rect Lights with Ray Tracing causes the project to crash. Reported and tested in version 4.26.0(CL 14419252). Tested and not found in version 4.25.3(CL 13942748).  ...