Unreal Engine Issues
Unreal Engine Issues
Inconsistent behavior with Register State Branches
UE - Editor - Aug 31, 2023ISourceControlProvider::RegisterStateBranches(...) doesn't reliably warn on conflicts ISourceControlProvider::RegisterStateBranches(...), specifically FPerforceSourceControlProvider, is supposed to ...
Assertion failed in FNetGUIDCache::CleanReferences during seamless travel after reloading primary asset package
UE - Networking - May 7, 2025Following this sequence of events, the ObjectLookup and NetGUIDLookup on the server's PackageMapClient will end up in a bad state. In the ObjectLookup Map, the primary asset's package will be mapped ...
AMD GPU crash with "Video memory has been exhausted" error when increasing the World Partition world and using Water Body Ocean
UE - Graphics Tools - Terrain - Landscape - Dec 8, 2022Current steps describe the problem related to "Video memory has been exhausted (#### MB over budget). Expect extremely poor performance" on the AMD video card. In this case, the steps cause the GPU ...
Open Formats: Interchange Import Runtime - Interchange ImportAssetAsync runtime GLB import — materials, textures, tangents, and shaders non-functional in packaged builds (6 issues, UE 5.7.4)
UE - Editor - Open File Formats - Apr 30, 2026Description* We are using Interchange's `UInterchangeManager::ImportAssetAsync()` to import GLB files at runtime in a packaged (Shipping) application. The orchestration layer (`ImportInternal` in `In ...
Single digit frame rate when sculpting landscape foliage.
UE - LD & Modeling - Terrain - Landscape - Dec 9, 2016Getting a performance hit when sculpting landscape that has foliage on it. ...
Reproducible softlock on iOS
UE - Platform - Apple - Jul 18, 2023After performing the repro steps, screen will softlock unless you perform the "slide from 3 to 4, then back to 3" steps. Appears to be an iOS system bug, but see if we can find a workaround. ...
Duplicating an Instanced UProperty Component copies a reference, instead of a "deep copy"
UE - Gameplay - Jan 21, 2019Duplicating a UActorComponent that has an Instanced UPROPERTY does not perform a deep copy of the instanced property. It appears to only copy a reference to the instanced object. Where as, performin ...
RebuildHLOD UAT script doesn't properly handle the -nop4 command line flag
UE - World Creation - Worldbuilding Tools - HLOD - Nov 24, 2021The script performs P4 commands even if -NoP4 was specified. It should properly handle -NoP4 by checking for if (CommandUtils.P4Enabled) ...
Attachment changes on the client for non-replicated actor may be stomped by replication
UE - Networking - Aug 10, 2023For projects relying on attachment to be performed on the client before the server, such as to prevent latency, this can result in attachments being overridden when USceneComponent::OnRep_AttachChil ...
Difference in Shader Complexity view mode between Static Mesh and Painted Foliage Actors after Enabling 'Dbuffer Decals' in Project Settings
UE - Graphics Features - Oct 19, 2016The 'Shader Complexity' view mode is rendering differently between regular Static Meshes and Painted Foliage instances after enabling 'DBuffer Decals' The user is reporting that this does not seem ...