Unreal Engine Issues
Unreal Engine Issues
StreamableManager completion callback can happen after being canceled in same frame
UE - Core - Systems - Feb 16, 2024FStreamableHandle (used as part of the FStreamableManager system) has a CancelHandle function that stops it from calling any completion callbacks related to that handle (it could cancel the load req ...
Rotated RetainerWidget does not account for rotation during hit testing
UE - AI Workflows - UI Systems - Jan 21, 2026Hit testing for widgets contained within a RetainerWidget does not correctly account for rotation applied via render transforms . While the content renders with the expected rotation, hover and clic ...
Correct Morph Targets animate in PIE, but not in Standalone Game
OLD - Anim - Mar 5, 2015Wrong morph targets are animating in standalone game, but the right ones play in PIE See the Additional Info URL for the user's description (and youtube video) Here is the project: [Link Removed] ...
This user's Function Library will not save
UE - Gameplay - Blueprint - Mar 6, 2015This user's Function Library will not save. Hitting save returns the following error: Can't save D:/4.7_Projects/EngineTransientBug 4.7/Content/Math.uasset: Graph is linked to private object(s) in ...
Crash when adding multiple collision types to a mesh
Tools - Jan 27, 2017Adding various collision types to a single mesh will cause it to hard crash the editor. No Crash Reporter window will open. Note that this happens with the user's mesh, but I was not able to repro ...
'Platform Stats' incorrectly display the number of Texture Calls for a material
UE - Rendering - Architecture - Materials - Jul 29, 2024When the DBuffer is disabled in the project settings, the Material Editor Stat page will still display the estimated texture lookups for the DBuffer. It appears that the code that adds these estimat ...
Hang when using Debug config with Launch On to Android
UE - Platform - Mobile - Mar 18, 2019Final bits of logging show:D/UE4 : [2019.03.18-16.36.59:236][ 0]LogInit: Display: Starting Game. D/UE4 : [2019.03.18-16.36.59:236][ 0]LogNet: Browse: /Game/FirstPersonCPP/Maps/FirstPerson ...
Favorites category in the Palette Panel of a Widget is no longer appearing
UE - AI Workflows - UI Systems - UMG - May 26, 2023This is not a regression tested in //UE5/Release-5.1 CL23901901 When Favoriting a Component from the Palette panel of a Widget the Favorites category appears then disappears. For the brief moment i ...
Blueprints converted to static mesh with negative scales for a component will invert the faces
Tools - Dec 19, 2016Negative scaled static mesh components in a blueprint will invert their faces when converted to a static mesh. Note that this does not happen in the following situations: If the BP is scaled negat ...
Crashes when playing Slomo on NiagaraSystem with Solo and DesiredAge.
UE - Rendering - Architecture - Niagara - Mar 23, 2023When Slomo 2 is used to speed up the process, TicksToProcess is greater than 1, which means that ManualTick is called several times during one loop. When playback is completed by a ManualTick in t ...