Unreal Engine Issues
Unreal Engine Issues
Xcode 26/16.4 Metal Toolchain generates metallib's that are not compatible with iOS 16
UE - Platform - Apple - Sep 23, 2025Below 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] Linux crash - FMonitoredProcess::Launch()
UE - Platform - Linux - Sep 14, 2017This is an infrequent Linux crash occurring in 4.17.1. Callstack from Log[2017.09.06-15.26.30:028][666]LogLinux: Error: appError called: Assertion failed: Assertion failed: [File:/home/***/.local/ ...
Shipping build crash when unplugging then replugging Oculus HMD
UE - Platform - XR - Nov 9, 2016Game crashes in shipping build when un-pluging the Oculus HMD, then plugging it back in. Confirmed in 4.13.2 from the launcher, did not repro via same steps in 4.14 preview 3 ...
[CrashReport] Crash CheckForWorldGCLeaks() - EditorDestroyWorld()
UE - AI - Sep 8, 2017This is a somewhat common but longstanding Mac crash that has affected users since at least 4.13. Recently in 4.17.1, the crashes are all occurring in various ARKit projects User DescriptionsI add ...
Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior
UE - Simulation - Core - Nov 21, 2024Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior. In the repro project provided (see addl in ...
Crash calling user-function in non-editor
Tools - Apr 27, 2020Crash occurs when attempting to call native Pre-Construct in the attached project. ...
Using nativized functions on buttons to spawn meshes causes assertion failure
UE - Gameplay - Blueprint - Oct 25, 2016An assertion failure is thrown when using nativized functions on an Android device. ...
Unable to change Actor Coloration View Modes in PIE
UE - World Creation - Worldbuilding Tools - Jul 20, 2025When in PIE changing Actor Coloration view modes from the viewport visualisation mode [Liit] -> [Actor Coloration] -> ... Does not update correctly when switching view mode and sometimes isn't corr ...
AR Core - Apps with Candidate image result in black screen on first launch
UE - Platform - XR - Jan 20, 2020On first launch of an AR app with Android the camera passthrough will render black. This also happens if an app is minimized and re-opened. This will not repro if there is no candidate image assign ...
Using a Wait Delay node on Linux causes editor to immediately close without crashing
UE - Platform - Linux - Sep 14, 2015If a call is made to the blueprint node Wait Delay the editor will immediately close during PIE when the call is made without the crash reporter appearing. The "Wait Delay" node only exists on Linu ...