Unreal Engine Issues
Unreal Engine Issues
Character unnecessary step down during PHYS_Flying mode
UE - Runtime - Character - Jan 15, 2026When MovementMode is set to PHYS_Flying, the character may unexpectedly step down by MaxStepHeight when colliding with a wall near a ceiling. This occurs because UCharacterMovementComponent::StepUp ...
BlueprintNativeEvent functions break on hot reload
UE - Gameplay - Blueprint - Mar 7, 2015A blueprint that uses a node for a BlueprintNativeEvent function breaks on hot reload. Blueprint cannot be saved or compiled. Compile error states: Error This blueprint (self) is not a HOTRELOADED ...
SetMaterial allows the user to add a Material which updates the GetMaterials array but not GetNumMaterials
UE - Gameplay - Jan 15, 2015SetMaterial allows the user to add a Material which updates the GetMaterials array but not GetNumMaterials. The user who reported this was trying to add a material to a skeletal mesh during runtim ...
Crash when setting Project to only use Windows and DX11 with texture compression as BC7
UE - Graphics Features - Jan 11, 2016When user sets their texture compression to BC7 while the project settings are set for Platform to only be Windows and use only DX11 this will cause any textures with this set to cause a crash when ...
Setting Pressed Sound for Widget Style Doesn't Set the Value
UE - Editor - UI Systems - Nov 6, 2015Attempting to set the Pressed Sound for Widget Style dynamically never actually sets the sound. When you click the button, you get no pressed sound. However, when setting the Pressed Sound through t ...
[CrashReport] UE4Editor_Landscape!ALandscapeProxy::PostEditChangeProperty() [landscapeedit.cpp:3692]
UE - LD & Modeling - Terrain - Landscape - Jul 19, 2017This is a common crash affecting users in 4.16. Unfortunately they have not provided any additional details. Source Context 3684 // Remove null layer infos 3685 EditorLayerSettings ...
[CrashReport] FGenericPlatformMemory::OnOutOfMemory | TArray<FCompressedChunk,FDefaultAllocator>::ResizeTo
UE - Foundation - Core - Jul 20, 2017This is a common crash affecting users in 4.16, and has occurred since at least 4.12 for more than 200 unique users. The callstack has similarities to [Link Removed], and as-such may be out of our ...
UConsole HistoryBuffer no longer writing to disk in packaged builds
UE - Core - Systems - Sep 7, 2023We started running into issues with the console history not saving after upgrading to 5.2.1. The console history (as in the commands last input into the in-game console) is no longer being saved bet ...
Masked TwoSided material causing lumen direct lighting to leak through walls
UE - Rendering - Features - Lumen - Apr 23, 2024It appears that LumenScene's Hardware Ray Tracing is causing light leaking into a sealed room (which should be perfectly black). This bug does not appear to happen on AMD GPUs. ...
High Virtual Texture Sample/Lookup Cost when using a Virtual Texture in a Material Layer Blend
UE - Rendering - Architecture - Materials - Mar 14, 2025Some Material Attribute blends in Material Layer Blends can cause Virtual Texture samples to be duplicated in HLSL. This can be avoided by sampling the Virtual Texture in the Parent Material, and pa ...