Improper Initialization of trigger values when added at runtime with the key pressed already

UE - Gameplay - Input - Nov 11, 2022

See the comment on UInputTrigger::LastValue around issues being a bool type on first tick ...

Camera actor preview window does not display properly in orthographic view

Tools - Apr 13, 2015

Adding a camera to the scene and setting the projection mode to orthographic doesn't display properly in the preview window. ...

Compiling blueprint with anim bp crashes editor in MathExpr exec

UE - Gameplay - Blueprint - Jan 30, 2016

Compiling a player character blueprint that is tied to an anim bp crashes the editor. Frequency: 2/2 Crashreporter: N/A ...

LIVE: The editor crashes on Mac when attempting to open the attached Media Player .uasset

Tools - Nov 4, 2014

Does not occur on PC. CRASHREPORT: [Link Removed] CALLSTACK: <unknown module>! FOutputDeviceMacError::HandleError() <unknown module>! EngineCrashHandler(FGenericCrashContext const&) <unknow ...

Code classes with a portion of the project name and parent type cannot be created.

Tools - Feb 25, 2015

When adding code to a project, class names cannot be used if they contain a portion of the project's names and the type of class of the parent. Message says that the name is already used by another ...

Converting Texture Sample to Parameter when MipValue set to "Level" or "Bias"

UE - Rendering Architecture - Materials - May 27, 2015

When a Texture Sample's MipValue is set to something other than "none" (which adds the extra pin), attempting to convert that Texture Sample to a parameter will cause the Editor to crash. (Simple r ...

Box selection in orthographic view ports with nothing previously selected will select BSP brushes even when you are not passing over edges or vertices

Tools - Feb 13, 2015

Box selection in orthographic view ports with nothing previously selected will select BSP brushes even when you are not passing over edges or vertices. The current expected behavior is that it would ...

Mouse cursor appears outside of viewport while in PIE if UE4 and UDK are both open

Tools - Jan 15, 2015

Mouse appears outside of viewport window when cursor is dragged off of editor window while UDK is open. This occurs even if UDk is minimized. Note: Cursor will appear outside of editor window but a ...

A bug in UBTService_BlueprintBase makes it impossible to create "deactivation-only" BP implemented BT services

UE - AI - Jan 22, 2016

A bug in UBTService_BlueprintBase makes it impossible to create "deactivation-only" BP implemented BT services. ...