Unreal Engine Issues
Unreal Engine Issues
Cook non-determinism when serializing UObject pointers pointing to garbage
UE - CoreTech - UObject - Aug 25, 2025There's a cook determinism issue in the way UObject unversioned serialization handles UObject pointers pointing to garbage. Depending on GC timing, it can either be skipped (as a property matching C ...
Cross-Compiling for Linux-ARM fails to compile
Tools - Aug 11, 2015Following the directions on the wiki for cross compiling on Linux ([Link Removed]) fails when trying to package the project. ...
AI Controller Remains in World Outliner After Being Destroyed
UE - AI - Apr 18, 2017Destroying an AI Controller does not seem to remove it from the world. The controller will still remain in the World Outliner even after Destroy is called. Attempting to get the AI Controller after ...
Override Attenuation Can't be Unchecked When Audio Component Added to Blueprint and Blueprint Attached to Actor
UE - Audio - Dec 20, 2017Checking Override Attenuation in Details < Audio Component < Attenuation disables settings that further adjust the Attenuation. Such as: Attenuation Air Absorption, Attenuation Listener Focus, Atte ...
Animation Blueprint with Shared Transition "marked" dirty
OLD - Anim - May 14, 2019Animation Blueprints which contain a shared transition used to transition between two animation states will be marked as "dirty" every time the blueprint is compiled and re-opened. ...
Lyra - attribute sets of characters placed on world partition boundaries break in PIE
UE - Gameplay - Gameplay Ability System - Jun 28, 2023When placing an instance of ALyraCharacterWithAbilities on the map on the boundary between world partition cells, it fails to take damage in PIE. The expected attribute sets (HealthSet and CombatSet ...
Plugin OculusAudio module could not be found when packaged through UFE in binary
UE - Foundation - Cpp Tools - Plugin System - Jun 3, 2015This issue also occurs This is the same error as in [Link Removed]. Discovered by a user on AnswerHub, I was able to reproduce this error in today's 4.8 branch, CL 2575437 Attached to his thread ...
Editor gets stuck "Updating file(s) source control status" when importing multiple FBX files with Git source control
If a user attempts to import multiple FBX files into a project that is set up with Git source control, the message "Updating file(s) source control status..." will appear and stay on the surface ind ...
Editor crash opening level with instance blueprint component
UE - Gameplay - Blueprint - Feb 20, 2017When an actor has an instanced blueprint property, the order in which the map's imports are being verified when loading can cause the editor to crash. For example, trying to load an instanced bluep ...
MoviePipeline Project Settings can't refer to Plugin classes
UE - Anim - Sequencer - Feb 12, 2022A workaround might be to use the CDO of your plugin to reach out to the Editor settings and assign itself to the fields you want. This removes the users ability to choose between multiple options. ...