Editing Blueprint default values will make the level it is contained in get marked as dirty

UE - Gameplay - Blueprint Editor - Mar 10, 2023

When Blueprint default values are edited, those edits will also be propagated to any active instances in the level. Each edit event will mark the level as dirty. Similarly, in a World Partition map ...

Editing multiple Math Expressions will crash the editor

UE - Gameplay - Blueprint - Dec 30, 2014

Editing multiple Math Expressions will crash the editor. ...

MAC: Drop Down Menus Continuously Flicker (In Certain Conditions)

UE - Editor - UI Systems - Slate - Nov 4, 2015

Shown in the Behaviour Tree Graph, if the Dropdown menu's length exceeds the Behavior Tree Graph window, the menu will try to offset it's position in order to display all information and will flicke ...

Bounds location of apex destructible mesh will not be updated when added to sequencer directly from content browser

UE - Simulation - Physics - Destruction - Apr 22, 2020

Destructible mesh's location will not be updated when added to sequencer directly from content browser, unless two different locations are keyed on the transform track of the mesh. We found the bug ...

Importing an FBX twice will cause a crash

UE - Platform - Linux - Apr 9, 2015

When importing an FBX into a project if the "Import" option is chosen rather than "Import All" then importing the same FBX a second time will cause the editor to crash. ...

Discrepancy in screen data read back in Materials from screen UVs

UE - Rendering Architecture - Materials - Mar 2, 2023

This needs to be debugged to see where the data discrepancy comes from. ...

When importing an FBX with Combine Meshes = False, one uasset will be created for the collection of assets.

Tools - Feb 4, 2016

When importing a mesh, there is an option to Combine Meshes, which by default is checked. Unchecking this option will bring in the individually named parts contained in the FBX as unique objects in ...

Rendering from the Movie Render Queue at runtime while using the current level will fail, even when the levels match

UE - Anim - Sequencer - Jul 22, 2021

When Use Current Level is true, the MRQ tries to validate that the maps are the same, but this will fail when the maps actually do match.  The Use Current Level flag should allow the render to cont ...

Back ground blur causes crash on iphone 5

UE - Editor - UI Systems - Apr 28, 2017

Back ground blur causes crash on iphone 5 (NOT iPhone5 c or iPhone5 s ) ...

Transforming inherited component in editor will crash

Tools - Mar 6, 2015

When a component inherited from code is transformed in any way with the viewport controls (arrows, rotation sphere, scale boxes) the editor will crash. Using the value boxes to set the transform do ...