Unreal Engine Issues

Clothing Pops on start and LOD switching

Clothing can have noticeable popping when switching LODs, and there is currently no mechanism to initially start cloth in a resting pose, causing popping on spawn. ...

Tilemaps with masked materials respond to lighting at incorrect directions

Tilemaps using lit methods of rendering are subject to strange lighting behavior. If the material for the tilemap is using a 'masked' method of rendering.  Lighting will appear at incorrect angles. ...

Triggering a HotReload Compile when Start up is Manual can result in an Editor crash: Assertion failed: GIsHotReload, Trying to recreate class outside of hot reload!

Torrigered when hotreload is performed in a case where code referencing to dll. Crash when restarting from VisualStudio. It didn’t see in 4.21. Workaround:   Delete the Intermediate folder and e ...

Crash when trying to copy-paste nodes in a module graph

The nodes I tried to copy are in the screenshot. Hit an ensure before the crash: Ensure condition failed: ScriptVariable != nullptr [NiagaraScriptGraphViewModel.cpp][Line: 294] Script variable sh ...

UPrimitiveComponent mouse events when underneath Slate widgets not correct

Licensee is adding a widget to the viewport overlay via AddViewportWidgetContent(). The widget receives mouse input when hovered. They return unhandled from all their widget's onmouse functions and ...

Crash occurs selecting play in Vulkan Mobile Preview without sdk installed

Was attempting to repro [Link Removed] in //UE4/Main when I hit the following crash ...

TMap Contains Node Returns False Incorrectly Under Specific Circumstances

The Contains node doesn't return an existing row from a data table under specific circumstances. This didn't occur when the struct the data table is based on was made via blueprints or there are mor ...

Switching a code project created in a source-built Engine to use the binary Engine results in files being deleted from the binary Engine installation

If a code project is created in an Engine built from source code, and then it is switched to use a binary Engine installed by the Launcher, building the project in Visual Studio will result in numer ...

[CrashReport] UE4Editor_HotReload!`FHotReloadClassReinstancer::UpdateDefaultProperties'::`2'::FPropertyValueMemoryWriter::operator<<() [hotreloadclassreinstancer.cpp:372]

This is a common crash that has occurred for users since at least 4.16. User DescriptionsUsing the PIE i compiled some c++ then quit the PIE before the end of the compilation. Source Context 35 ...

[CrashReport] UE4Editor-Engine!FPrecomputedVolumetricLightmapData::ReleaseRHI() [PrecomputedVolumetricLightmap.cpp:303]