Editor crash when adding elements to blueprint Set/Map

UE - Gameplay - Blueprint - Mar 22, 2017

Adding multiple element to TMap / TSet variable at once with a for loop causes the editor to lock up / crash (respectively). Regression: No - Map & Set variable types not available prior to 4.15 ...

When adding the UIRenderer to the Movie Render Queue, the rendering output is a difference in PIE and MRQ.

UE - Anim - Sequencer - MRQ - Dec 5, 2023

UI rendering in PIE and UIrenderer rendering in MRQ produce different output results. This is because when dealing with fades in the UI, the rendering results should not be different.  Workaround ...

Packaged Project fails to load on Firefox with QuotaExceededError

UE - Platform - Mobile - Apr 17, 2017

Error message is displayed on Firefox 52.0.2 (64-bit) QuotaExceededError TypeError: eventHandler.target is null QuotaExceededError This is a regression from 4.15.2 and does not occur on Chrome. ...

"Invalid resource entry creating uniform buffer" when running Vulkan on Mobile

UE - Platform - Mobile - Apr 30, 2019

Android projects in 4.22.1 crash on launch with Vulkan enabled. Did NOT reproduce in 4.23 MAIN at CL 6156332 4.22.1 release CL is the same as a related fix for this ( [Link Removed] )  ...

Editor Drop Down Menus become out of place when moving across a small screen to a larger display

UE - Platform - Apple - Feb 13, 2015

In a Mac environment with where a MacBook Pro 15" retina display is used in combination with a larger 25" display "traditional resolution" the menus will drop down as expected on where the editor is ...

Crash on level change when "Use Single Process" is false and "Play as Client"

Tools - Jun 20, 2017

When "Use Single Process" is off (unchecked/false) and "Play as Client" is selected, using the console command "Open [LevelName]" causes the editor to crash Regression: No - same behavior occurs in ...

Crash Occurs on Exiting Standalone After Using DemoPlay

UE - Networking - Mar 2, 2017

Using Execute Console Command nodes to record and play back a demo is causing a crash in standalone. Using the console commands themselves does not seem to cause the same crash to occur. ...

Crash generating grass for landscape with XY offset map

UE - LD & Modeling - Terrain - Landscape - May 8, 2015

Landscape grass map generation crashes if the landscape component in question uses an XY offset map. --------- Fatal error: [Link Removed] [Line: 646] Rendering thread exception: Fatal error: [Lin ...

HLOD build crashes when GroupActor is present

UE - World Creation - Worldbuilding Tools - HLOD - May 24, 2022

The licensee shared information that a Null check on the following Actor can be used as a workaround. static TArray<UActorComponent*> GatherHLODRelevantComponents(const TArray<AActor*>& InSourceAct ...

Component default data can be lost for a non-nativized Blueprint class that inherits the component from a nativized parent Blueprint class.

UE - Gameplay - Blueprint - Sep 5, 2018

This is a regression that was introduced by the fix for [Link Removed]. The fix makes an invalid assumption that instances of components whose archetypes are inherited by a non-nativized child Blue ...