Unreal Engine Issues
Unreal Engine Issues
Modules tab fails to load when rebooting a project.
UE - Editor - Apr 19, 2022If the user makes a project where the modules tab appears in Tools > Debug and then reboots the project, the modules tab disappears. This only happens if the project that is loaded has the module ta ...
Network Emulation outgoing dropped packets on client higher than expected
UE - Networking - Oct 14, 2022Under certain network emulation settings, it looks like outgoing packets from the client will be dropped in groups (around 4 or more packets at a time) rather than individually. This leads to the ac ...
Using justification on an Editable Text Box delays one frame
UE - AI Workflows - UI Systems - UMG - Jan 17, 2023The display implementation is in the level blueprint. [Image Removed] ...
Lumen scene view - spot light cut off
UE - Rendering - Architecture - Dec 1, 2023This looks to be an issue with shadows in Lumen Direct Lighting, and might be coming from the "Batched lights" pass. ...
Go to end and Stop on level sequences does not work with keep state animations and anim bps
UE - ACT Character - Anim in Engine - Jan 16, 2024When a skeletal animation section is set to Keep State, and the mesh uses an anim BP and slots to play back the animation, calling Go to End and Stop on the sequence will not pause the animations. ...
GPU event descriptions are not properly formatted in Insight
UE - Rendering - RHI - Jun 24, 2025Context Unreal Insights displays Timing Insights that can include GPU timing information. Rendering code such as FDeferredShadingSceneRenderer::RenderPrePass() generate such events.Problem Certain f ...
FD3D12BindlessResourceManager::GrowCPUHeap will cause GPU heap activation whether it's needed or not
UE - Rendering - RHI - Sep 11, 2025The ctor of FD3D12BindlessResourceManager implies that GPU heap activation is intended to occur lazily with ERHIBindlessConfiguration::RayTracingShaders, however any call to FD3D12BindlessResourceMa ...
Niagara NDC GPU Instance Counter leak
UE - Rendering - Architecture - Niagara - Jun 5, 2026In NiagaraDataChannelData.cpp, FNiagaraDataChannelDataProxy::EndFrame enqueues a GPU readback for each entry in PendingGPUReadbackBuffers, but the corresponding FNiagaraGPUInstanceCountManager::Free ...
Attempting to override timeline function in child blueprint crashes editor
UE - Gameplay - Blueprint - Sep 24, 2015Attempting to override a timeline within a child blueprint causes the editor to crash. Frequency: 4/4 Crashreporter: [Link Removed] ...
Blur effect caused by command Stereo On
UE - Platform - XR - Jan 22, 2015When the console command "Stereo On" is used to start a game in fullscreen, objects in the level appear with a slight blur. Pressing Alt+Enter will "refresh" the screen and eliminate the blur effec ...