Unreal Engine Issues
Unreal Engine Issues
[CrashReport] UE4Editor-MetalRHI.dylib!FMetalDeviceContext::CreateDeviceContext()
UE - Graphics Features - Feb 10, 2017Error message: SEGV_MAPERR at 0x3 Source Context: Most recent user affected CL: 3249277 Logs: [Link Removed] [Link Removed] [Link Removed] [Link Removed] CrashReporter User Descriptions:Just i ...
Physics Substepping doesn't have the same effect from 4.15 to 4.16
OLD - Anim - Aug 8, 2017Physics Substepping doesn't have the same effect from 4.15 to 4.16. In 4.16+ the ponytail in the provided project will have a jitter effect even with substepping enabled. This is a regression: Work ...
Simulated ability tasks not being cleaned up in UActorChannel::ReplicationMap
UE - Networking - Nov 20, 2018I've noticed the issue occurring in both 4.20.3 (CL 4369336) and 4.21.0 (CL 4541578). The user on AnswerHub has also noticed the issue in 4.20.2 (CL unknown) and claims the issue did not occur in 4. ...
No arm64 folder exists in plugins leading to an Error when packaging plugins
UE - CoreTech - Nov 16, 2022Regression: Checked in UE5/Release-5.0, the folder is missing from the plugin as well. This issue appears to be a problem with packaging the plugin itself, rather than packaging a full project. Pac ...
Always Relevant actor may replicate incorrect movement mode when the walkable floor becomes irrelevant
UE - Gameplay - Player Movement - Feb 26, 2024When the character class is set to always relevant, if a client travels very far away from another character, such that the character is relevant but the component they're standing on is not (but al ...
PakFiles: Unmounting PakFile while requests are still in progress causes assertion failure in UnMount
UE - Foundation - Mar 31, 2022[Link Removed] Licensee is using the chunk downloader. On Shutdown method of their GameInstance, they call FChunkDownloader->Finalize. When they quit the game (Alt+F4) during a chunck download an a ...
"Go to Definition" does not work properly in Binary
UE - Foundation - Core - Feb 1, 2018Using the Go to definition option on a blueprint node in the Binary editor opens Visual Studio but does not actually show the definition as requested. The user is instead given the following warning ...
NaN Present on IOS after UE5.6 Because of Removal of MobileSpecularGGX
UE - Platform - Mobile - Sep 24, 2025In UE5.6 MobileSpecularGGX was removed and now mobile devices also run D_GGX. The problem is that there are still cases where very bright values are produced (image 1) and thus NaNs appear in the Bl ...
[Enhanced Input] Edge case where bShouldBeIgnored incorrectly being reset after FlushPressedKeys is called
UE - Gameplay - Input - Apr 2, 2026[Link Removed] From UDN, the steps for their repro case: Normal case: Frame N : AddMappingContext → bShouldBeIgnored=true → FlushPressedKeys → bDown=false Frame N+1: OS IE_Repeat arrives → ...
VehicleGame cannot Compile in the Editor if it was created with a name other than "VehicleGame"
UE - Foundation - Core - Mar 12, 2018Attempting to compile a VehicleGame project will fail if it was created with a name other than "VehicleGame". ...