Unreal Engine Issues
Unreal Engine Issues
Unable to edit blueprint instance's components when attached to another actor
UE - Gameplay - Blueprint - Feb 22, 2019Attempting to edit the properties of a component on an instance of a Blueprint class that initializes its RootComponent in its Constructor and is attached to another actor in the level results in od ...
Black flickering on Mesh particles when the Renderer is set to a non-default Facing Mode or using Orient Mesh to Vector and when using Particle Position in the Material's WPO
UE - Niagara - Jul 23, 2020Black flickering on Mesh particles when set to a non-default Facing Mode or using Orient Mesh to Vector and when using Particle Position in the Material's World Position Offset ...
Non-reflected header files not recognized by UHT
UE - Foundation - Core - Jul 28, 2015A user adds 3 .h files though Visual studio where the first contains a struct, the 2nd includes the 1st, the 3rd includes the 2nd and tries to make a variable of the struct declared in the 1st. The ...
Opening Editor preferences window while simulating and pressing Play/Stop causes memory leak
UE - Foundation - Core - EditorLoader - Feb 3, 2020An open but minimized Editor Preferences window causes a memory leak while simulating and repeatedly pressing Play/Stop. ...
Crash in UDataTable::RemoveRow(FName RowName)
UE - CoreTech - Jun 13, 2025This is a regression, the crash seem to have been introduced by CL 40129784 on ue5-main and persists in latest. Function UDataTable::RemoveRow(FName RowName) uses macro DATATABLE_CHANGE_SCOPE_SINGL ...
Gameplay effect modifier tag requirements are not checked for Instant/periodic effects
UE - Gameplay - Gameplay Ability System - Jun 19, 2023When creating a GameplayEffect, modifiers can tag requirements for the Source and Target tags. For Duration gameplay effects, these tag requirements are checked from FAggregatorMod::UpdateQualifies ...
Blueprint Diff tool does not mark changed properties as having been changed if they are in a custom nested category
UE - Gameplay - Blueprint - Jun 12, 2018The Blueprint Diff tool does not highlight properties that have been changed from a previous version of the Blueprint if those properties are contained in a custom nested category. REGRESSION: No. ...
Fractured Geometry Collection triggers a crash when colliding with an Animation Blueprint with a Rigidbody Node
UE - Simulation - Core - Sep 25, 2023This is not a regression. Tested in //UE5/Release-5.2 CL26001984 The editor crashes when a physics asset of an animation with rigid body collides with geometry collection. ...
Game projects that rely on legacy include paths are not compatible with Blueprint nativization.
UE - Gameplay - Blueprint - Nov 10, 2018Using legacy-style #include paths in a game project is allowed by UBT by default, but it's currently not compatible with Blueprint nativization, as it does not account for this possibility. Current ...
App crashes when executing 'Export to Disk' node on Android
UE - Platform - Mobile - Aug 11, 2020Regression is unconfirmed ...