Unreal Engine Issues
Unreal Engine Issues
Variable Value Range doesn't work during Runtime
Tools - Jul 3, 2018If a variable has been set to a default value and has a declared value range, it will ignore the value range and print the set value.The tooltip text is misleading or out of date as it gives the imp ...
Device Token can not be Acquired When Remote Notification on iOS
UE - Platform - Mobile - Dec 3, 2018I received a report that there is a situation in UE 4.21 that it is not possible to acquire push notification device token on iOS And they seem to have solved the problem by fixing the following pa ...
SynthComponent does not execute OnStop() after calling Stop()
UE - Audio - Nov 26, 2019SynthComponent does not execute OnStop() after calling Stop(). OnStop() will be called in PumpPendingMessages() via OnGeneratePCMAudio(). But after stopping the AudioComponent, the procedural Sound ...
Crash when plugging Depth Fade to Base Color and using Required Texture Resolution mode
UE - Graphics Features - Dec 1, 2020Crash when plugging Depth Fade to Base Color and using Required Texture Resolution mode Hi, We have a material that uses the Depth Fade node for the Opacity and Base Color. However, the engine cras ...
Niagara preview viewport and timeline are locked to 30fps
UE - Niagara - Aug 10, 2020The Niagara preview viewport seems to be fixed at a 30fps update time, which makes it difficult to fine-tune short lifetime FX. It would be good to either have options for viewport max fps, or for s ...
[AI] UE_MT_SCOPED_READ_ACCESS(NavElementAccessDetector) Fails in editor on fresh sync
UE - AI - Navigation - Jan 27, 2025Licensees have reported failed multi-thread access code for NavElementAccessDetector in complex levels that have not finished compilation of their static meshes. The eventual failed check is inside ...
Wolrd Partition Foliage Builder - Fails to build with multiple external actor folders.
UE - World Creation - Worldbuilding Tools - World Partition - Apr 1, 2025Hello, We are building a world with world partition & a lot of nanite foliage. We want to modify out Foliage Instance grid size via the commandlet. [Link Removed] Even in a new empty level the c ...
LOD glitch when using Control Rig with Import Skeleton node
UE - Anim - Rigging - Control Rig - Aug 26, 2025In Unreal Engine 5.6 and Main, a glitch occurs when switching between LODs in a character setup that uses a Control Rig to dynamically load the skeleton hierarchy through the Import Skeleton node in ...
Fog Does Not Behave As Expected in Splitscreen
UE - Graphics Features - May 25, 2018This bug seems to repro very inconsistently for me, but I've seen it affect Atmospheric Fog and Exponential Height Fog, and reproduced in 4.18.3, 4.19.2, and Main CL 4093338. I've attached Config fi ...
Asset values change when the Editor is out of focus when using Maya or Web Browser
Tools - Jul 18, 2018When switching between any open software (Maya, web browser) and UE4 while Simulation is running, sometimes the values change on the asset and it starts to oscilate between <-0.6,0.6> or any other s ...