Unreal Engine Issues
Unreal Engine Issues
Crash when element is added to a map variable with unhashable key
UE - Gameplay - Mar 21, 2017Crash when element is added to a map variable with unhashable key. An error is thrown on compile but an element can still be added under the Details panel of the variable. Crash Reporter: [Link Rem ...
Crash when updating instanced subobjects in a USTRUCT
UE - Gameplay - Blueprint - Jul 5, 2017Attempting to edit array of instanced subobjects causes the editor to crash. ...
Opening a data table based on a struct with a slate brush variable crashes the editor
UE - Editor - UI Systems - Slate - Feb 1, 2016Attempting to open a data table based on a struct with a slate brush variable crashes the editor. Frequency: 2/2 CrashReporter: N/A ...
Crash when using AActor::Rename to change the Outer of an actor to a SubLevel
Tools - Apr 6, 2018Using AActor::Rename to change the Outer of an actor to a SubLevel will cause the editor to crash when the AActor is shown in the World Outliner. Regression?: Yes This does not happen in 4.18 but ...
Crash when using EditConditionHides with a struct in an array
UE - Editor - Workflow Systems - Jun 8, 2021A crash can occur in FStructurePropertyNode::GetValuePtrOfInstance when using EditConditionHides with arrays of structs. When deleting an element from the array, ParentBaseAddress will be null. ...
Free physics constraints between two objects of differing size causes smaller object to jitter
UE - Simulation - Physics - Sep 13, 2023A cube constrained to a physics actor will start to jitter uncontrollably when interacted with. (see attached media and repro steps for more details) Tested in the following //UE5-Release-5.3-CL ...
Crash when changing the AnimNotifyState property after moving the AnimNotifyState range added to AnimMotage
OLD - Anim - Jul 5, 2019NotifyStateClass may be nullptr when AnimNotifyState and AnimNotify swap occur in NotifyTrack. Workaround: SAnimNotifyPanel.cpp void SAnimNotifyPanel::OnPropertyChanged(UObject* ChangedObject ...
Assertion occurs when undoing a Child State's unparenting from another Child State in AI State Trees, leading to a crash.
UE - AI - StateTree - Apr 15, 2022Assertion occurs when undoing a Child State's unparenting from another Child State. Repro Rate: 5/5Assertion failed: false [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Public\Widgets\Views ...
WorldPartitionActorDescs for LevelInstanceActors are broken when migrating world partitioned level
UE - World Creation - Worldbuilding Tools - Level Instances - Jun 13, 2023WorldPartionActorDescs will be restored to the correct properties when resaved. They can also be fixed by the WorldPartitionResaveActorsBuilder commandlet. ...
Shadow artifacts on translucent objects when using the setting Cast Dynamic Shadows As Masked
UE - Graphics Features - Mar 20, 2025Flickering shadow artifacts can be seen with translucent mateirals with "Cast Dynamic Shadows As Masked" enabled. Please note that the artifacts disappear when switching from virtual shadow maps to ...