Unreal Engine Issues
Unreal Engine Issues
IKRetargeter Export Selected Animations Saves Exported Animations Even When Cancelled
UE - Anim - Rigging - May 3, 2022Occurs 3/3 times When 'Export Selected Animations' button is clicked and then canceled, animations continue to be saved. ...
UFE: Can't delete custom launch profiles
UE - Editor - UI Systems - Jul 26, 2023The confirmation message will fails spawning with the following messages in the log: [2023.07.25-20.04.01:038][ 0]LogWindows: Error: Failed to create dialog. The specified resource type cannot be ...
[MetaSounds][Audio Bus] - MetaSound Sources using Audio Bus nodes spam underruns when Audio Mixer Sample Rate is less or greater than 48kHz
UE - Audio - Audio Bus - Oct 5, 2023Setting the Audio Mixer Sample Rate to 32000kHz causes underrun spam in audio bus reader and writer nodes and sounds to playback jittery. Tested with 24kHz and 32kHz. Does not repro in //Fortnite/R ...
Bug with control rig display name and sequencer
UE - Anim - Anim in Engine - May 17, 2024Control Rig Tracks are not visible in Sequencer when the Name and Display Name are not set to the same value in the Control Rig graph, and the track filter is set to "Selected Control Rig Controls". ...
Screen Probes and Specular Firefly Flickering near screen edges
UE - Graphics Features - Lumen - Aug 6, 2024Lumen's rough specular indirect lighting buffer can have fireflies along the bottom and right edges of the screen. Also tested in //UE5/Main, CL: 35177423 ...
When actors are placed in a folder their attachment dependencies are no longer loaded when the root actor loads
UE - World Creation - Worldbuilding Tools - Aug 12, 2024Iris - Missed subobject destruction can cause incomplete client state
UE - Networking - Iris - Oct 7, 2024From UDN assigned to [Link Removed] ...
Mirror operation on Physics Asset produces wrong results for constraints, including flipped axes
UE - Simulation - Physics - Feb 7, 2025The Physics Asset Editor has a "mirror" feature that allows physics bodies and constraints to be mirrored from one side of a skeleton to the other. If this operation worked correctly, it could save ...
Vector VM - Crash / memory stomp when using > 255 external function calls
UE - Niagara - Aug 12, 2025The Vector VM has only every supported a byte's worth of external function calls, when we blew the limit it would index into the incorrect VM call. The new VM will also overwrite memory when exceed ...
Sequencer crashes when using Transform variable added to Scene component BP
UE - Anim - Sequencer - Oct 18, 2021This issue has not occurred in previous versions and seems to occur from 4.27. ...