Unreal Engine Issues
Unreal Engine Issues
Data Asset Deserialization crash after upgrading 4.19.2 to 421.1
UE - Foundation - Core - Feb 7, 2019The User has provided an extensive log of their code base setup, and the process leading up to when the Assert occurs. "Our game mode & player state FSM are setup in a data driven manor using UDa ...
Nav Area class is reset after updating from 4.19.2 to 4.20 Preview 3
UE - AI - Jun 21, 2018When upgrading a 4.19.2 project to 4.20 Preview 3 the Nav Area Class is changed to None instead of the value it was before the upgrade. Upgrading from 4.18.3 to 4.19.2 works as expected. This was t ...
iOS apps crash on devices with iOS version 11.2.2 when Metal 2.0 is enabled
UE - Platform - Mobile - Jan 22, 2018Launching an iOS App that is set to Metal 2.0 on a device with iOS version 11.2.2 causes the app to crash and return to the home screen. This was tested on an iPad Pro as I do not have access to any ...
Regression for changes in code character movement not affecting multiplayers
UE - Foundation - Core - Jun 26, 2015If MoveForward() function is changed to affect the speed of the player, when playing in a multiplayer game player 1 will be affected by the change but player 2 will not be. This is a regression - i ...
UMaterialBillboardComponent Memory Leak and Hitching (Unreal 4.19.2 + 4.19.1)
UE - Graphics Features - May 4, 2018Creating an actor with a UMaterialBillboardComponent causes Editor hitching. ...
Enum to Byte conversion returns 2 for the first enum then 4 then 6 and so on rather than 0, 1, 2, etc
UE - Gameplay - Blueprint - Sep 1, 2015Enum to Byte conversion returns 2 for the first enum then 4 then 6 and so on rather than 0, 1, 2, etc. This is a regression; does NOT occur in 4.8.3. Reproduced in 4.9.0 binary and Main (2675088) ...
Affect Indirect Lighting While Hidden can affect the environment after data layer unload in editor
UE - Graphics Features - Sep 9, 2024After setting Affects Indirect Lighting While Hidden but before saving the level, the emissive contribution persistents through datalayer visibility toggles. This does not appear to occur in PIE, on ...
Fields with Maximum resolution are not affecting all leaves of a Geometry Collection
UE - Simulation - Physics - Destruction - Apr 25, 2025Fields with Maximum resolution are not affecting all leaves of a Geometry Collection on 5.4 and onwards. When calling GetRelevantParticleHandles() a Maximum Resolution field does return all particl ...
Point Lights Y-Axis Rotation Changed from 4.18 to 4.19
UE - Graphics Features - Jun 6, 2018Possibly related to [Link Removed]. This affects Static, Stationary, and Movable point lights when upgrading a project from 4.18 to 4.19.2 or Main (tested in CL 4101872). If you click the "Reset to ...
Static meshes in a particle system are not affected by decals
UE - Graphics Features - Dec 21, 2017There is an issue where Static meshes in a particle system are not affected by decals, It is unsure if this is intentional behavior or not. This issue does not appear to be a regression Versions ...