Unreal Engine Issues
Unreal Engine Issues
All Classes Tab of Modes Panel Not Updating Automatically
Tools - Jun 2, 2016Blueprints are not appearing in the All Classes tab of the modes panel after being loaded until the tab is switched. Found in 4.12 binary. Reproduced in 4.11.2 binary and Main CL 2994701. ...
Changing transform of simulated component during physics freezes motion
UE - Simulation - Physics - Oct 13, 2016If something is executed before a SetActorRotation node on Tick inside of a SceneComponent class BP and then added to an Actor class BP, the physics will lag User Description: When using set rotat ...
A Client cannot join a Server after setting a GameMode in the OpenLevel node's Options string
UE - Networking - Nov 23, 2015A Client cannot join a Server after setting a GameMode in the OpenLevel node's Options string. Reproduced in 4.9.2 binary, 4.10.0 binary, and Main (CL# 2776829) ...
Traces to Spawned Destructible Mesh Actors returning inconsistent results
UE - Simulation - Physics - Destruction - Jun 18, 2015When spawning an Actor containing a Destructible Mesh and immediately doing a sphere trace to that actor, upon repeated spawns you will get False results for some time then True results for a while ...
Huge performance hit when recording a demo (demorec)
UE - Networking - Jun 3, 2019The current engine version (4.22) seems to suffer a huge performance hit when using the demo recording (demorec) feature. This issue is present in both the editor and the packaged game (developer bu ...
Setting ComponentTick as a Hide Category in an Actor Component Blueprint corrupts the BP and causes a crash when opened after an editor restart
UE - Gameplay - Components - Dec 2, 2015Setting ComponentTick as a Hide Category in an Actor Component Blueprint corrupts the BP and causes a crash when opened after an editor restart. [Link Removed] Reproduced in 4.9.2 binary, 4.10.0 b ...
D3D11 error when opening a level after version change
UE - Graphics Features - Sep 23, 2015After converting from 4.7.6 to 4.9.1 specific maps won't open and will crash the editor with a D3D11 error. This has been reported by multiple users but has not been reproduced internally. CrashRe ...
iOS movie become laggy and crashes when played in iPhone 6/6s.
UE - Platform - Mobile - Feb 24, 2017Movie play in iOS is laggy and crashes in some movie. This issue seems to be happening when the movie is played in umg widget. Tested in 4.14.3 4.15 Dev_Mobile Latest as of 2/24 Original UDN post ...
Skeletal mesh with SetTickableWhenPaused causes crash on pause
UE - Gameplay - Jul 31, 2015If a skeletal mesh component is has SetTickableWhenPaused set to true then the editor will crash when the game is paused. This happens when set in blueprint or code. ...
Downloaded Megascans assets cannot be accessed while offline
TM - Core - Mar 30, 2026Reported in SF [Link Removed] When launching and using Twinmotion 2025.2 or 2026.1 offline, the Megascans library becomes unusable due to the subfolders of the 3D assets, 3D plants, Surfaces and De ...