Unreal Engine Issues
Unreal Engine Issues
Destroying a welded actor is causing an Array index out of bounds crash on 5.6
UE - Simulation - Core - Jul 30, 2025Destroying a welded actor is causing an Array index out of bounds crash on 5.6. The licensee has provided a repro project that reliably causes a crash whenever the spawned actor is destroyed. There ...
Child Actor does not get BeginPlay if SetClass used inside Parent's BeginPlay
UE - Gameplay - Jan 20, 2017Per https://udn.unrealengine.com/questions/332025/childactorcomponents-spawned-actor-doesnt-get-begi.html If SetClass is used to set up a ChildActor as part of BeginPlay, that ChildActor does not g ...
Static mesh LODs other than LOD0 cannot be set to screen sizes greater than 1
Tools - Jan 26, 2017Static mesh LODs other than LOD0 cannot be set to screen sizes greater than 1 From this AnswerHub thread: https://answers.unrealengine.com/questions/525398/hismc-bug-always-show-lowest-lod.html ...
High Quality Gaussian DoF on Mobile is broken
UE - Platform - Mobile - Apr 11, 2018UDN issue: 4.19 High Quality Gaussian DoF on Mobile效果出错？ Another answer hub report: https://answers.unrealengine.com/questions/757162/dof-bug-on-mobile-with-419p4.html ...
Investigate if we can avoid re-sending properties using COND_InitialOnly when being woken from dormancy
UE - Networking - Oct 24, 2018Investigate if we can avoid re-sending properties using COND_InitialOnly when being woken from dormancy. See: https://udn.unrealengine.com/questions/463660/dormant-actors-replicate-properties-set-t ...
Scene Capture is not capture the planar reflection
UE - Virtual Production - Rendering - Jan 28, 2020https://udn.unrealengine.com/questions/545555/view.html The issue reports as a UDN ticket. Planar reflection is not captured by scene capture. [Link Removed] commented, I suspect it has to do w ...
Clothing Pops on start and LOD switching
UE - Simulation - Physics - Character - Sep 6, 2018Clothing can have noticeable popping when switching LODs, and there is currently no mechanism to initially start cloth in a resting pose, causing popping on spawn. ...
Editor Crashes When Duplicating Actor that Contains Additional Components
UE - Gameplay - Dec 11, 2015Attempting to spawn a copy of an actor that has components that were added to an instance of that actor in the level causes a crash. Spawning the actor without adding additional components to the in ...
Maximum number of State Machine connections?
OLD - Anim - Mar 16, 2015Adding more than 8 connections to or from a state in the state machine results in unpredictable behavior, like causing an animation to fail. (See image.) Was able to reproduce with user's test file ...
Mobile Map loading times have increased from 4.12 to 4.13
UE - Platform - Mobile - Oct 4, 2016The loading time from 4.12 to 4.13 on mobile devices seems to have increased quite a bit. My results: 4.12.5 Windows 7 - Launch On: Loading Level 2 - .51 Loading Level 3 - .74 Loading Level 1 - .73 ...