Unreal Engine Issues
Unreal Engine Issues
Crash on play if a BP uses a ClearInstances node followed by an AddInstance node
UE - Graphics Features - Jul 21, 2017Crash on play if a BP manipulates a InstancedStaticMeshComponent by using a ClearInstances node followed by an AddInstance node. This is a blocker for the licensee. This is a regression: Working ...
SubCategory of UFUNCTION does NOT work properly if using CallInEditor
UE - Framework - Blueprint Editor - Sep 20, 2022If you use both Category hierarchy and CallInEditor in UFUNCTION, it will result in an unintended sequence as shown below. [Image Removed] And, the following code can solve this issue void FDetai ...
Garbage Collection Causing Noticeable Hitches
UE - Foundation - Core - Apr 11, 2016Garbage Collection is causing noticeable hitches on whatever interval it is run on. This is noticeable in the UE4 Profiler, as you will see a spike every X amount of seconds, depending on how often ...
Blueprint child asset is set moved to offset position when set to simulate physics
UE - Gameplay - Mar 3, 2015When setting up a BP via the scene with the new method of adding components and converting to a BP the child component that is set to simulate physics enabled will be offset from its original positi ...
Cyrillic user name with Windows will prevent APEX cloth apb files from importing
OLD - Anim - Jan 29, 2015When the user name on Windows is set to cyrillic importing APEX cloth assets will fail. I'm not sure what other systems this may also affect, but adding a cloth apb asset to a skeletal mesh will cau ...
Enabling MobileHDR on Meta Quest 3 device causes intermittent hang in splash screen
UE - Platform - XR - Feb 2, 2026Using MobileHDR on an actual MetaQuest device (MQ3 tested) causes an intermittent hang/deadlock in the splash screen. This hang in the splash screen seem to happen maybe 1 in 5 times. The first ti ...
Null Redirector For Main Game Level Is Packaged Without Error After Fixing Redirector
Tools - Feb 24, 2020After moving a level into a folder and fixing the redirectors (right click in content browser) the project will package a Null reference without throwing an error. This will let you create a project ...
WildCard Inputs/Outputs Propogate Incorrectly in Macros
UE - Gameplay - Dec 13, 2019When a macro takes in a two Wildcard inputs and two Wildcard outputs connecting a variable to one assigns the value of all the outputs even if they don't connect (check attached image). You can see ...
Attached Project Crashes Intermittently On FTickTaskLevel::ScheduleTickFunctionCooldowns()
UE - Gameplay - Apr 20, 2016The user's project is crashing during PIE on FTickTaskLevel::ScheduleTickFunctionCooldowns(). Source Context: 798 else 799 { 800 CumulativeCooldown += ComparisonTickFuncti ...
Compiling Unreal Lightmass Fails When Using Visual Studio 2015 Update 2
UE - Foundation - Core - Apr 4, 2016When attempting to compile Unreal Lightmass in the 4.11 source build, a compiler error pops up when using Visual Studio 2015 Update 2. Error Message: "d:\unrealengine-release\engine\source\program ...