Physics Constraint Component loss of accuracy

UE - Runtime - Simulation - Mar 6, 2025

Physics Constraint Component has lost accuracy between Unreal versions 5.2 and 5.4 (and up). When measuring the exact distance between rigid bodies constrained by a Physics Constraint Component, the ...

AddChildActorComponent in Construction Script Causes Pending Kill Error

UE - Gameplay - Blueprint - Feb 16, 2016

When using AddChildActorComponent in the construction script of an actor and attempting to get a reference to the child actor that is stored in a variable on Event Begin Play, the editor throws erro ...

After importing morph target: Ensure condition failed: Referencing SkeletalRenderGPUSkin.cpp

Tools - Sep 23, 2017

Hit handled ensure when dragging the slider in Morph Target PreviewLogOutputDevice: Error: Ensure condition failed: DynamicData->MorphTargetWeights.Num() == LODModel.MorphTargetVertexInfoBuffers.Get ...

Detour AI Controller Not Functioning Properly

UE - AI - Oct 30, 2015

Using AI Detour in 4.9.2 works as expected, however, when upgrading a project from 4.9.2 to a newer version, the AI pawns fail to properly navigate around each other when moving to their respective ...

Splash screen on iOS is stretched

UE - Platform - Mobile - Dec 22, 2015

The splash screen on the iPhone 6s is stretched when loading. Tested alongside the iPhone 5s and the Samsung Galaxy Note 2 for comparison. The stretching only occurs on the 6s. iPhone 6s: 6240_iPho ...

Unreal Logo in Display 3.1 Continues to Spin After Button is Turned Off

Docs - Samples - Sep 21, 2016

While writing test cases for the Blueprint Communication Content example, I came across this inconsistency. The logo continues to spin even after the button is no longer active. I expected the logo ...

Twinmotion hangs when importing an .obj file.

TM - Interoperability - Feb 1, 2024

Reported by client in SF [Link Removed] When importing an obj file, Twinmotion hands during the import. This only occurs in 2023.2.1 and does not occur in the 2023.1.2 version or earlier. Was able ...

Crash when Listen Server Attempts ServerTravel in Play in New Editor Window

UE - Networking - Jun 9, 2015

JamesG: New callstack on UDN thread points to UNetDriver::TickFlush Editor crashes if a listen server attempts to use the console command ServerTravel while in Play in a New Editor Window. CrashR ...

AI Perception Not Showing Up in Debugger

UE - AI - May 20, 2016

AI Perception does not seem to be showing up in the debugger. The same setup functioned as expected in 4.11.2 binary, but upon converting the project to 4.12 Preview 4 binary, no debug information w ...