Unreal Engine Issues
Unreal Engine Issues
Client movement and animation are heavy jittered on listen server
UE - Gameplay - Player Movement - May 10, 2019The listen server will see jitter in clients character movement and animations. This is hard to notice without the "slomo" command but is extremely obvious using "slomo". Clients will see server and ...
Animation curves on Montages are not remapped when using a 'Compatible' skeleton
UE - Anim - Runtime - Jun 27, 2023[Link Removed] From UDN: If you are using the new compatible skeletons feature and you have a Montage with an attribute curve on it, the curve is not correctly mapped to the target skeleton. So ...
Landscapes cause Vulkan crash related to GRHISupportsAttachmentVariableRateShading
UE - Rendering - Architecture - RHI - Nov 7, 2022Binary (Installed Build)//UE5/Release-5.1 @CL22986940 I encountered this same crash when creating a landscape twice, but was not able to consistently reproduce it with those steps. I figured out th ...
EditInlineNew specifier for UClasses causes issues with the editor UI
Tools - Dec 10, 2015When a class uses the EditInlineNew specifier, the resulting class has some errors when interacting with the editor. 1. Unable to assign existing blueprints based off the class to an array of that ...
Linked Anim Graph With Mesh With Post Process BP Has Faster Animation Playrate
OLD - Anim - Jan 20, 2020When an animation blueprint is using the "Linked Anim Graph" node and it's skeletal mesh has a post process animation blueprint the animation is played at the wrong playrate. Linked Anim Graphs wer ...
zero-volume being cutoff and not restarted when non-zero
Licensee reported issue with recent changes to sorting that include volume-weighting. Previously, the sort was just due to priority (which was usually 1.0 and thus the sort was nearly random) and ha ...
Planar Reflections Cause Big Performance Hit In Packaged VR Projects
UE - Platform - XR - Jan 22, 2020Planar reflections notably lower performance in packaged VR project. Linked is an example project and an example package. [Link Removed]. This was tested on a Vive Pro and Oculus Rift(not Rift S). ...
OnTextChanged not called for UEditableTextBox / UMultiLineEditableTextBox when text is set programmatically
UE - Editor - UI Systems - Sep 29, 2025When calling SetText() on a UEditableTextBox or UMultiLineEditableTextBox, the OnTextChanged delegate is not triggered. This regression was first reported in UE 5.3 and acknowledged previously in UD ...
FBX Scene Importer sets actors in Blueprint to movable when reimporting
UE - Editor - Content Pipeline - Import and Export - Nov 28, 2016When using the FBX Scene Import into Level with default settings so that the actors in the BP import as static, if you reimport them they will then be set to Movable in the BP. This is not a regre ...
Anisotropy not working correctly when used in Material Layers
UE - Rendering - Architecture - Materials - Jan 17, 20241. When a Material Layer is applied and there is no node connected to Anisotropy in the master material(M_Test_1), the material does not function correctly after packaging, although it works properl ...