Unreal Engine Issues
Unreal Engine Issues
Assertion failed on attempt to reload edited Dataprep asset
UE - Editor - Open File Formats - Visual Dataprep - Feb 28, 2022Editor crashes after user tries to reload Dataprep asset after editing Filter By Actor label card in QAEnterprise project. Regression - Yes(Priority Critical), wasn't able to repro this issue in // ...
Thirdperson Character not Replicating correctly after being attached to an Actor
UE - Networking - Dec 20, 2017Problem description: When the Third Person Character gets attached to any other Actor (AttachToActor, Rule: Keep World), from the view of other clients the character (capsule, skeletal mesh) is out ...
.ini files for packaged games have their settings wiped clean every time the game is run.
The settings .ini files for games packaged for windows appear to be getting overwritten with blank files whenever the game is run. Even if settings are added to the .ini files manually, the files be ...
Combining Layered Blend Per Bone with Cached Pose nodes can break root motion extraction
UE - MVF Character - Animation - Aug 23, 2023When the input to a Layered Blend Per Bone node is two instances of the same cached pose, we aren't sampling root motion correctly. In the attached example, the weight on the root bone is 0 and Ble ...
"Enable Stencil Test" Mobile crash
UE - Graphics Features - Sep 10, 2019A material with 'enable stencil test' will crash on mobile. Enable Stencil Test is a new option in materials as of 4.23 Confirmed with OpenGL 3.1 + 2 and Vulkan on Pixel XL Also Crashes on iOS ...
Scene Color node with UV input on a transparent material renders incorrectly in stereo
UE - Platform - XR - Jan 19, 2021From Licensee: When we have Instanced Stereo enabled, all our materials that use Scene expression nodes (SceneDepth, SceneColor, etc...), render incorrectly in the right eye. It only happens to the ...
Deadlock in UAnimationSequencerDataModel::Evaluate where FScopeLock Lock(&EvaluationLock) blocks execution indefinitely
UE - Runtime - Animation - Nov 4, 2025When both the Sequencer Editor and an Animation Curve Editor are open for the same animation asset, the editor freezes completely upon editing the curve. Analysis indicates that the freeze is caus ...
Possible incorrect pointer manipulation in BeginPackageCacheForCookedPlatformData
UE - Foundation - Core - Cooker - Dec 12, 2017In UCookOnTheFlyServer::BeginPackageCacheForCookedPlatformData(), there is a pointer to int32 called CurrentAsyncCache that is used as an index. It's value is dereferenced before it is checked, but ...
"Save Current As" is not fully loading the newly-saved level
Tools - Mar 15, 2017Workaround: Navigate to and open the newly-created level in the Content Browser prior to LaunchOn. After using the Save Current As tool, Game runs into error when trying to LaunchOn. Editor display ...
Exporting Mannequin to Blender then Re-importing to UE4 Incorrectly Rotates Animations by 90 Degrees
OLD - Anim - Jun 16, 2015Exporting the UE4 Mannequin to Blender then re-importing to UE4 breaks the animations, causing them to reimport rotated 90 degrees ...