Crash when calling capture mouse as the return value in an OnKeyDown

UE - Editor - UI Systems - Sep 25, 2017

The editor crashes when calling an over ridden On Key down function in a widget in order to capture the mouse with the return value of the function. ...

Multiple Physics objects on the client in one place jitter and shake

UE - Simulation - Physics - Jun 4, 2018

When simulating physics on multiple objects, they appears to jitter and shake on the client. This can lead to differences between the server and the client. This is especially show cased when runnin ...

Crash due to LAN beacon packet incompatibility in 4.22

UE - Networking - Apr 17, 2019

We changed the IP address serialization format without bumping the LAN beacon packet version. Should just need to bump it up. ...

Standalone window played from editor hits assert Index >= 0 in UObjectArray

UE - Gameplay - Blueprint - Sep 23, 2016

Standalone window in editor will hit assert in a bit of time. Issue doesn't happen is playing standalone via Visual Studio. ...

Crash on exit PIE when playing with more than one player on Linux

UE - Platform - Linux - Oct 3, 2016

When playing in non-single player game in the editor (either set # players or check dedicated server checkbox), the editor will crash when the play session ends. Regression: Yes - editor does not c ...

Editor Freeze-Crash if Possessing Pawn with AI controller

UE - Gameplay - Mar 19, 2018

When trying to possess an already existing, uncontrolled character with an AI controller on server (from actor component) while in multiplayer mode, the editor keeps freezing until destroyed with t ...

User widget object is invalid when called in a widget component on BeginPlay

UE - Editor - UI Systems - Jun 25, 2019

User widget object is returning invalid inside of a widget component ...

Android API 30 LaunchURL Not Working

UE - Platform - Mobile - Jul 22, 2021

The LaunchURL blueprint node is not functioning when using non-default browsers in API level 30 on Android Devices. Another licensee reports that the default browser may not be relevant, as any brow ...

Rect light LTC textures fail to load when cooking with bSharedLinearTextureEncoding enabled

UE - Texture - Apr 2, 2025

When running a build with bSharedLinearTextureEncoding enabled, View.GGXLTCMatTexture and View.GGXLTCAmpTexture are pointing at the black texture fallback, which affects correctness of rect lighting ...