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 The logo continues to spin even after the button is no longer active.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 ...

Ease Function resets Blend Exp on Restart

UE - Gameplay - Blueprint - Jan 27, 2015

The Ease Node when set to use the Function Ease In, Ease Out or Ease InOut the Blend Exp will reset to 2.0 on each editor reload. It will even break variable inputs to return to 2.0. Reproduced in ...

Certain combined Linear/Angular movements cause Client to freeze for several seconds

UE - Simulation - Physics - May 24, 2019

When using Replicated Movement, certain combined linear/angular movements cause the client to freeze for several seconds and then catch up to the server. This is a regression from 4.21.2 (CL-4753647 ...

COM Media Type error in video writer on 8K videos

TM - Rendering - Dec 12, 2024

360 videos set to 8K resolution will fail to render in Twinmotion 2024.1.2 and newer Render attempts will end abruptly shortly after being initiated with the following error message ion the logs L ...

Converting a landscape to blueprint crashes editor

UE - Gameplay - Blueprint - Sep 17, 2015

Converting a landscape to a blueprint immediately crashes the editor. Frequency: 2/2 ...

Assertion failed: !EditReregisterContexts.Find(this)

UE - Gameplay - Jun 22, 2015

Editor crashes if a blueprint has "Can Ever Affect Navigation" changed multiple times and is compiled. Crash link: [Link Removed] Frequency: 4/4 ...

Setting a component to replicate in an Actor that is already set to replicate alters the location of the mesh on the Client after enabling physics

UE - Networking - Jan 27, 2016

Setting a component to replicate in an Actor that is already set to replicate alters the location on the Client after enabling physics. Note this only appears to occur with components added in Const ...