Unreal Engine Issues
Unreal Engine Issues
Root Motion (RMFE) - Blend with cached pose causes inaccurate root motion
UE - Anim - Gameplay - May 28, 2015With Root Motion From Everything enabled, a Blend node gives different results when feeding it Animation Sequences directly or when first using a Cached Pose. *Simple test project attached Two sce ...
The Child Actor Component cannot be selected in the Blueprint Editor Viewport
UE - Gameplay - Jun 8, 2015The Child Actor Component cannot be selected in the Blueprint Editor Viewport. Selecting the Child Actor Component in the Components tab is the only way to select the component. Reproduced in 4.7.6 ...
Attach in Sequencer causes erratic translation values on Child
UE - Anim - Sequencer - May 5, 2016Attach in Sequencer causes erratic translation values on Child ...
Component in Child Blueprint Parented to Inherited Component Disappears
UE - Gameplay - Components - Mar 4, 2016When you have a child blueprint that contains a component that is parented to an inherited component, changing a value on that inherited component in the original parent blueprint and then compiling ...
Compile failure adding BTTask_RunBehavior C++ class to project
UE - AI - Dec 22, 2016Error message in log is:CompilerResultsLog:Error: Error MyBTTask_RunBehavior.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplay ...
Compute shader TAADilateVelocity crashes on macOS
UE - Platform - Apple - Oct 14, 2021Summary A licensee recently integrated the Oceanology 5 plugin from the marketplace and it triggered a crash on macOS/Metal.Platform The licensee is running macOS Bit Sur 11.5.2 on an AMD Radeon Pro ...
Take Recorder - Viewport Freezing and Performance Degradation When Recording Without Subsequences
zComponent - Archive - Apr 11, 2024Description: In Unreal Engine 5.4, when recording camera movements using the Take Recorder with the "Record Sources Into Sub Sequences" option turned off, significant viewport freezing and performan ...
Nanite Mesh Dither Opacity Mask Not Working in 5.6.0
UE - Graphics Features - Nanite - Jul 30, 2025In Unreal Engine 5.5.4, the Dither Opacity Mask option in a Masked material works correctly on Nanite meshes. However, in version 5.6.0, the dithering effect no longer applies to Nanite meshes. ...
Blueprints copied or moved to another level do not retain variable references to other Actors that are also copied or moved
UE - Gameplay - Blueprint - Apr 17, 2015Blueprints copied or moved to another level do not retain variable references to other Actors that are also copied or moved. Reproduced in 4.7.5 binary and Main (//depot/UE4/Promotable-CL-2507843) ...
Blueprint navmesh modifier does not update navmesh in level
UE - AI - Jun 21, 2015CrashReporter: [Link Removed] The Navmesh Modifier Component in blueprints does not properly update a levels navmesh. ...