[Enhanced Input] Chord trigger fails when its referenced action lives in a lower-priority IMC

UE - Gameplay - Input - May 18, 2026

Summary A UInputTriggerChordAction does not fire when the action it references (the "chording action") is mapped in a different Input Mapping Context with a lower priority than the IMC containing the ...

PATH not passed to NMake script when building Android from Visual Studio

UE - Core - Cpp Tools - UnrealBuildTool - Jan 25, 2023

After upgrading from UE5.0.3 to UE5.1, we started seeing this error when trying to build Android Development from Visual Studio (VS2022 17.2.1): Running UnrealBuildTool: dotnet "..\..\Engine\Binari ...

AdditionalPluginDirectories/RemappedPlugins doesn't work for packaged/zenstore build when plugin directory is relative and outside of project directory

UE - Core - Systems - Mar 14, 2024

Originated from UDN post:https://udn.unrealengine.com/s/question/0D5QP000007QWuz0AG/additionalplugindirectories-outside-of-project-visual-studio-and-zenstore QUOTE: TLDR: Use of 'escape' paths in U ...

Null FPhysicsActorHandle dereference in FBodyInstance::InitDynamicProperties_AssumesLocked when CreateShapes_AssumesLocked fails during async body init

UE - Runtime - Simulation - Aug 2, 2026

Summary When CreateShapes_AssumesLocked fails during async body creation, the failed FBodyInstance is left in Bodies[] with a released actor handle. InitDynamicProperties_AssumesLocked is then called ...

Xcode 26/16.4 Metal Toolchain generates metallib's that are not compatible with iOS 16

UE - Platform - Apple - Sep 23, 2025

Below is the error output from FirstPerson template as a C++ project: {+}../../../FirstPerson58CPP/Content/firstperson58cpp_sf_metal_es3_1_ios-metal_es3_1_ios.0.metallib, 5881486 bytes!2025-09-23 1 ...

[CrashReport] FMacWindow::ApplySizeAndModeChanges | SWindow::ReshapeWindow()

UE - Platform - Apple - Dec 1, 2017

This is an infrequent Mac crash in 4.18. Users have not provided any descriptions of their actions when the crash occurred. The callstack is similar to both [Link Removed] and [Link Removed] Call ...

Ortho near plane clips geometry in Editor Top view

UE - Graphics Features - Aug 9, 2024

When the viewport is in Top (ortho) Lit mode the near plane clips through geometry as you zoom the view in and out. ...

Display 1.2 bouncing ball has a typo in the Math Hall of ContentExamples

Docs - Samples - Sep 19, 2016

Just a typo that needs to be fixed. ...

In Niagara's "CalculateParticleRadius", StaticSwitch Input is connected

UE - Niagara - Jan 24, 2020

This may not compile properly. Should be fixed. ...

When the sequencer is shot, the constraint Binding ID becomes an unresolved binding

UE - Anim - Sequencer - May 12, 2021

This problem is not reproduced in 4.25. ...