Unreal Engine Issues
Unreal Engine Issues
Incorrect CRC hash for shared fragments with FInstancedStruct member
UE - AI - Mass - Mar 30, 2026User has encountered an issue with shared fragments that contain a member variable of type FInstancedStruct. It appears that UE::StructUtils::GetStructInstanceCrc32() does not correctly compute the ...
Blueprints from UE4 with dangling delegate reroute node crashes on UE5 load
UE - Gameplay - Blueprint Compiler - Dec 22, 2023If a project from UE 4.27 or earlier has a blueprint with a reroute node dangling (no outgoing connection) from a Custom Event Node's delegate pin (red), this blueprint will crash when loaded in UE ...
Crash importing morph targets with animation and opening it in animation editor
UE - Graphics Features - Mar 31, 2017Lina encountered a crash when importing the attached FBX file with morph targets and animation, and then opening it in the animation editor. I was not able to reproduce this issue in QAGame (her re ...
"Set Animation Mode" creates multiple instances of the AnimBP
UE - Gameplay - Blueprint Editor - May 12, 2015Changing the Animation Mode repeatedly creates a new instance of the AnimBP being used every time you switch back to the Animation Blueprint mode. Example Project: [Link Removed] ...
BP Struct's 'Bool variable' will reset back to it's default value on compile
UE - Gameplay - Blueprint - Mar 18, 2015BP Struct's 'Bool variable' will reset back to it's default value on compile. ...
Foliage Painted on BSP is Deleted after Building Geometry
UE - World Creation - Worldbuilding Tools - Foliage - Dec 15, 2014After painting foliage meshes on a BSP surface and rebuilding the level (more specifically the geometry), the meshes are deleted. This bug is especially nasty because you cannot Ctrl+Z after buildi ...
Inputs on Find Item Node Can be Connected to Executions
UE - Gameplay - Blueprint - Jun 27, 2016When using a Find Item node to search for something in an array, you are able to connect execution pins to the node, which then changes it to require an array of execs as an input. ...
Color Picker always select sRGB color space even when toggled off
Tools - Jan 9, 2015The Color Picker is showing a difference in color space when toggling the sRGB setting, but the final resultant color is always the sRGB true color. ...
Assigning a new Collision Channel to an already fractured Destructible will cause a crash
UE - Simulation - Physics - Destruction - Sep 6, 2016The editor will crash when assigning a new collision channel to an already fractured destructible mesh. Tested in: 4.13 CL-3106830 4.14 Dev-Main CL-3109838 ...
Crash when DFAO is disabled and a lower scalability is used while Distance Field Shadowing is enabled.
UE - Graphics Features - Feb 2, 2016When enabling Distance Fields for a project and adjusting the cvars to disable DFAO and set a lower Detail Mode will result in a crash. Using the console commands outlined in the steps will work. ...