Unreal Engine Issues
Unreal Engine Issues
Actors in Level Sequence in a World Partitioned level do not move
UE - World Creation - Worldbuilding Tools - World Partition - Jan 11, 2023Regression: Tested in UE5/Release-5.0, this issue does not occur so it is a regression This issue occurs when the cube has "Is Spatially Loaded" enabled in Details as well as when the cube is added ...
Adjusting transform of a mesh with LODs causes LODs to flicker
UE - World Creation - Worldbuilding Tools - Foliage - Jun 3, 2015If a hierarchical instanced static mesh has LODs and is scaled in a blueprint, the mesh will rapidly switch between LODs, causing a flickering effect. Note: This only seems to occur if the camera ...
[Audio Modulation] - Ensure is thrown when attempting to modulate a Source Effect at runtime
UE - Audio - Modulation - Sep 6, 2023Does *not* occur in editor. Only in standalone and runtime. Occurs when modulating Chorus or Bit Depth Also occurs in 5.2 and 5.3. I also noticed the test with this is supposed to set the chorus e ...
FHLSLMaterialTranslator::GetMaterialEnvironment can crash or not load UMaterialParameterCollections
UE - Rendering Architecture - Materials - Apr 30, 2025In UE 5.5, the Editor may crash in FHLSLMaterialTranslator::GetMaterialEnvironment when loading materials with Material Parameter Collections, likely due to async loading. Calling ParameterCollectio ...
GoogleARCoreJavaHelper functions are not correctly exported publicly
UE - Platform - XR - Oct 31, 2018The jni functions in GoogleARCoreAndroidHelper.cpp are not correctly exported, when we tried to build a Test project it failed with this exception: java.lang.UnsatisfiedLinkError: No implementatio ...
Crash: Landscape Materials Missing on Shipping and Development Packaged Builds
UE - Foundation - Core - Sep 9, 2019When running a packaged build of a project with a level with a landscape that has a material assigned it will crash (shipping build) or not retain the assigned material (development build). There i ...
Disabling Use Localized Graph Editor Nodes and Pins causes split struct pin names to disappear when compiling
UE - Editor - UI Systems - Localization - Oct 19, 2016If the Use Localized Graph Editor Nodes and Pins option is disabled, compiling a blueprint will cause the pin names from any split struct pins to disappear. Regression?: Yes This occurs in 4.13.1 ( ...
Second player's screen does not render in Split Screen on Android
UE - Platform - Mobile - Mar 21, 2019The second player's screen in a Split Screen multiplayer session on Android does not render. It remains completely black. This was also an issue prior to 4.15 but was fixed with [Link Removed]. The ...
Objects without custom delta properties can return false for CanSkipUpdate with net.PushModelSkipUndirtiedReplication enabled
UE - Networking - Jun 5, 2023This seems to occur after receiving a Nak for certain actors. FObjectReplicator::ReceivedNak will decrement SendingRepState.CustomDeltaChangeIndex even if the object has no custom delta properties. ...
Chaos Cloth: NaNs can be introduced from bad AnimatedPositions/Normals
UE - Simulation - Physics - Character - Aug 17, 2024We've worked out at least a possible way this can occur from using uninitialized AnimatedNormals values when changing LODs. Ensuring all AnimatedNormals are initialized appears to fix the problem. ...