Removing created event from level BP crashes editor if event is tied to object in level

UE - Gameplay - Blueprint - Feb 21, 2015

UPDATE: 2/23/2015 Crash is limited to 4.6.1, does not occur in 4.7 Preview 8 or later builds (CL#2448202). ========================================================== Editor crashes if an event is ...

When a fixed delta time step of 0.02 or higher is used with some skeletal mesh objects, rotational forces applied using AddTorque have no affect on the skeletal mesh.

UE - Simulation - Physics - Jan 27, 2015

Using AddTorque to apply a rotation to a skeletal mesh does not always provide the expected results if a fixed time step is being used. When doing this to the Owen character in the Content Examples ...

Cut & Paste in Sequencer breaks with Attach track

UE - Anim - Sequencer - Jan 15, 2025

Cutting two tracks in sequencer, which one is attached to another one, and pasting it break with Attach track. By this operation, Attack track loses its binding object. Copying such tracks and paste ...

Sun is rendered badly or not showing on mobile devices.

UE - Platform - Mobile - Jan 27, 2015

When you deploy the First Person Template to a mobile device, the sun will appear badly rendered or not rendered at all. Tested on iPhone5S, iPad Air, GalaxyS3 Mail, Nexus 6, iPad Air 2, Nexus 5, G ...

[CRASH]SIGSEGV: invalid attempt to access memory at address 0x0

Tools - Jan 7, 2015

Callstack: <CALLSTACK START> FTaskThread::ProcessTasksUntilQuit(int) Address = 0x1091943e5 (filename not found) [in UE4Editor-Core.dylib] RenderingThreadMain(FEvent*) Address = 0x10de37e4b (filena ...

CRITICAL: Regression: CRASH: SHOOTERGAME: Client crashes when using ServerTravel command

UE - Networking - Sep 17, 2014

Update (5/4/15): New repro steps using Main (//depot/UE4/Promotable-CL-2535351): 1. Create a new Blueprint project 2. Create 3 new Levels: MainMenu, Lobby, and Level 3. Create 3 new GameModes: Main ...

Editor 'Build All Levels' discards Volumetrics Lightmaps in persistent level

UE - Graphics Features - May 14, 2025

Building the level or lightmaps can clear the volumetric lightmap. In 5.5, this requires you to perform a full build, or a lighting only build with a BSP brush in the scene. In 5.6, all level build ...

Certain particle effects in ContentExamples pause when looked at on Mac with Metal

UE - Platform - Apple - Aug 20, 2016

Certain particle effects in ContentExamples stop playing when looked at from a specific angle. The affected demos are 2.1, 2.4, 2.5, and 2.7 Seen on an Nvidia MacbookPro and AMD MacPro Does not o ...

Make Lidar Point Cloud Point Node has had the Location input change from a Vector to a Vector 3f

UE - Gameplay - Oct 12, 2022

Tested in: //UE4/Release-4.27 CL 18319896 Input pin was of type Vector //UE5/Release-5.0 CL 20979098 Input pin was of type Vector 3f //UE5/Release-5.1 CL 22346211 Input pin was of type Vector 3f Th ...

Can not affect "r.SetRes" command in editor new window

UE - CoreTech - Jul 11, 2022

When playing in "New Editor Window" mode, entering the r.setres command does not change the screen size. This worked in UE4.27, but no longer works in UE5.0. ...