Unreal Engine Issues
Unreal Engine Issues
Time Synth fails to play 96KHz audio clips
UE - Audio - May 19, 2020TimeSynth 96KHz music clips only play for a split second and then stop. 48KHz files play correctly however 96KHz 16-bit and 24-bit files do not This was reported and tested in 4.25 (CL-13144385) an ...
Networked Root Motion Sources can experience desynchronisation that is not present in animation root motion under forced adjustment
UE - Gameplay - Player Movement - Feb 13, 2024In a networked environment with high packet loss (or high forced adjustment factor), motion applied using Root Motion Sources can desynchronise under conditions that animation root motion does not. ...
When running multiple clients in PIE the second player's inputs become toggled every tick when setting Input mode Game only on tick
UE - Editor - UI Systems - Slate - Jul 9, 2015A user has found that setting input mode to game only on tick will cause the client in PIE to toggle their inputs on and off every tick. If this test is run with a single player the inputs are const ...
Sound Track in Matinee Ignoring Track Location and Playing Audio at Beginning of Sound Wave/Cue
Tools - Sep 22, 2015When scrubbing the Matinee handle with a Sound Track added, no matter the location of the handle, the sound wave associated will play from the beginning of the audio file. Tested in 4.8.3 - 2634408 ...
Broken hair material with light function
UE - Graphics Features - Dec 19, 2024Hair Materials do not react to Light Functions in the same way as other Materials. There is a visual difference between a Directional Light at 1 lux with no Light Function and a Directional Light at ...
Swarm Agent Binaries Missing in Launcher 5.7 Preview
UE - Foundation - Build - Rocket (Installed Engine) - Oct 23, 2025The Swarm binaries are missing from Engine\Binaries\DotNET in the 5.7 Preview launcher version of the engine. This causes any lighting build or precomputed static visibility builds to fails due to t ...
Visual Studio opens unnecessary windows when adding a new C++ class via the editor's interface
Tools - Oct 25, 2017When adding a new C++ class to a project via the editor's interface, Visual Studio is opened but it ends up opening more than is necessary. Firstly, Visual Studio is opened without focus on the two ...
[CrashReport] UE4Editor_LevelEditor!FMulticastDelegateBase<FWeakObjectPtr>::RemoveAll() [multicastdelegatebase.h:81]
Tools - Oct 26, 2017This is a trending crash in 4.18.0. One case of this callstack occurred in 4.17.1, but then numerous have occurred in 4.18. Users have not provided any descriptions of their actions when the crash ...
SetActorLabel resets components when run outside main editor process
Tools - Mar 30, 2015Calling SetActorLabel causes an actor's components to return to default states when called from a client accessing a listen server outside of main editor process. Note: User posted code linked to ...
Small objects have erratic behavior when simulating physics
OLD - Anim - Aug 22, 2017Small objects have erratic behavior when simulating physics. If drop at an angle, some will start spinning indefinitely on contact with the ground while others will spin in place when hit. This is ...