Unreal Engine Issues
Unreal Engine Issues
Replication issues & warnings if a client hitches while the server seamless travels
UE - Networking - Jul 28, 2020If a client hitches while a server performs a seamless travel, the client will get multiple lines of logspam of these warnings:Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/ ...
Undo then Redo Creating a Spawnable in Sequencer Creates Extra Actor in Level
zComponent - Archive - May 3, 2023There is a bug when performing an undo/redo on pasted or spawned actors in Sequencer. It appears that the transaction system is re-creating an actor on redo, but Sequencer doesn't see that, so it ...
Reflection capture doesn't work when using Lumen GI and SSR
UE - Rendering - Architecture - Mar 24, 2025Reflection Capture does not appear to work with Lumen + SSR. Licensees have reported that there are cases where they want to combine Lumen GI, SSR and Reflection capture for quality and performance ...
Source Control: Perforce Branch History is Parsed Incorrectly
Tools - Sep 26, 2016Several issues have been reported within the ParseHistoryResults method from PerforceSourceControlOperations: 1. Any Records that share the same filename will only display the last record with that ...
Extremely long Spline Point will cause the editor to lose FPS
Tools - Nov 13, 2015Extremely long Spline Point will cause the editor to lose FPS and crash some machines User Description: A couple of times I've accidentally scaled a spline node to be huge, causing the spline to ...
Artifacts when using virtual textures for multiple attributes in material layers
UE - Rendering - Architecture - Materials - Sep 29, 2022When using the Material Layer system and virtual textures, the number of physical texture samples in the shader increases with the number of material attributes that a virtual texture writes to. The ...
Actor Components incorrectly appearing mixed with the Scene Component Hierarchy in the Component Tab of the Blueprint Editor
UE - Framework - Blueprint Editor - Dec 19, 2025This is a regression introduced by CL 45871568 in ue5-main branch. The new function FFBlueprintEditorDefaultSortUICustomization::SortSubobjectData() in file "BlueprintEditorSCSEditorUICustomization. ...
Possession is not replicated properly to some clients
UE - Networking - Nov 8, 2018A user has reported an issue where Possession replication or Character Movement replication, unsure of which, is not working properly for some clients. It seems to work fine for the first client but ...
Hierarchical and normal Instanced Static Mesh Components do not maintain PerInstanceRandom values when transforms are modified
UE - Graphics Features - Nov 6, 2017When using PerInstanceRandom in a material that is applied to a Hierarchical or normal Instanced Static Mesh component, there are issues of the value resetting when certain transform operations are ...
Distance Field AO not Rendering in VR
UE - Platform - XR - Mar 24, 2017Distance Field Ambient Occlusion does not render in VR. I mentioned to the user reporting this issue, that using DFAO is more than likely disabled by default due to the baseline cost of using the ' ...