Unreal Engine Issues
Unreal Engine Issues
[Reverb Effect] - Deactivate Reverb Effect Blueprint Doesn't Deactivate Reverb
UE - Audio - Aug 11, 2021When deactivating a reverb, it's removed from the Activated List, but doesn't get removed from being the active reverb. Confirmed occurs in 4.27 and 5.0 ...
BlackmagicMediaSource causes a memory leak if "Just-In-Time Rendering" option is ON.
UE - Virtual Production - IO - Media - Oct 31, 2023Since 5.3, BlackmagicMediaSource causes a memory leak. This didn't happen on 5.2. You can see the leak on PIE. [Image Removed] [Image Removed] If "Just-In-Time Rendering" option in the MediaB ...
Upgrading Project After Disabling Light PropagationVolume Plugin Causes Crash
UE - Foundation - Cpp Tools - Plugin System - Apr 1, 2016Attempting to upgrade a project from 4.10 to 4.11, or 4.11 to 4.12 with the LightPropagationVolume plugin disabled causes it to crash. Found in converting a 4.10 project to 4.11, and reproduced con ...
[CrashReport] UE4Editor_Kismet!FBlueprintGlobalOptionsDetails::CanDeprecateBlueprint() [blueprintdetailscustomization.cpp:5127]
UE - Gameplay - Blueprint Editor - Jul 19, 2017This is a common crash affecting users in 4.15 and 4.16, affecting over 200 unique users so far. User Descriptionsattempt to import bp from example Source Context 5124 { 5125 // I ...
IOS 11 Freezes When Generating Particles Using SphereMask
UE - Platform - Mobile - Nov 16, 2018When playing a particle using SphereMask, iOS 11 device terminal freezes.This issue is not a crash, it's screen freeze. Reproduced deviceiphoneX :iOS 11.4.1iphone7 :iOS 11.4.1 Not reproduced devic ...
Sequencer's View Options>Expand/Collapse Nodes and Descendants (Shift+V) does not Collapse after being Expanded (UE5.6)
UE - Anim - Sequencer - Jun 25, 2025Sequencer's View Options>Expand/Collapse Nodes and Descendants (Shift+V) does not Collapse after being Expanded (UE5.6). As described in the Steps to Reproduce section, the command expands the prope ...
VisionOS deferred renderer regression
UE - Platform - XR - Sep 11, 2024Deferred desktop renderer does not function correctly on visionOS. It did work in 5.4. One problem is the r.XRMSAAMode setting forcing 4 samples even when not using msaa, but there are other probl ...
Assert triggering when trying to copy-paste an empty CurveAtlasRowParameter node in the material editor
UE - Rendering Architecture - Materials - Mar 25, 2024A check happens when copy/pasting a Curve Atlas Row Parameter Expression that has no value. This behavior also exists on CL 32426910 of Release-5.4. ...
Release Notes shows Unreal Editor 4.27 notes
Docs - Apr 25, 2022In the Epic Game Launcher the Release Notes button shows the Unreal Editor 4.27 release notes even if the user only has Unreal Editor 5 installed. ...
No sound plays when using Built-In Spatialization or Simple ITD plugins
UE - Audio - Spatialization - Nov 10, 2021No audio can be heard when using the Built-In Spatialization plugin. This is a regression from 4.26. Occurs in 4.27 and 5.0. ...