Unreal Engine Issues
Unreal Engine Issues
[AI] Area Class to Replace does not work on SplineNavModifierComponent
UE - AI - Navigation - Jun 16, 2025The SplineNavModifierComponent does not have the same behavior as regular nav modifier components where the modifier can specify that it only replaces a given NavArea class. Setting the area class t ...
The Delay node cannot be added to the StandardMacros bp in the Engine folder
UE - Gameplay - Blueprint - Jan 19, 2015The Delay node cannot be added to the StandardMacros bp in the Engine folder. However, the Delay node can be added to a new Macro Library bp and any Macro in an actor class blueprint. ...
Crash right-clicking in anim blueprint asset picker
OLD - Anim - Mar 10, 2017Editor crashes when right-clicking in the blank area of the anim blueprint asset picker ...
Crash on PIE exit after dynamically enabling and disabling tick functions through the Level Script blueprint.
UE - Gameplay - Mar 23, 2018User reports hitting an assertion due to invalid FTickTaskManager state when game is attempting to unregister a tick function that was previously disabled dynamically. Failed assertion is in FTickT ...
New Visibility Track creates an offset Visible(0) track in Sequencer
UE - Anim - Sequencer - Jan 14, 2017The new Level Visibility track creates a Visible track that appears that it is created in the middle of the sequencer tracks. You are able to move the Visible track up flush with the timeline by cl ...
D3D HUNG crash - FD3D11DynamicRHI::RHIReadSurfaceFloatData()
UE - Graphics Features - Jan 18, 2017This is one of the widespread D3D Hung crashes that have existed since 4.14. This particular callstack has affected around 300 users. The issue has been successfully reproduced on a home PC. Dxdi ...
Input disabled for all UMG when SetIsEnabled is called from code
UE - Editor - UI Systems - Mar 10, 2017Calling SetIsEnabled on a UMG button in code will prevent any UMG input from being read (can't click other buttons/checkboxes, can't enter text into field, etc). Regression: No - code used does not ...
Per-section shadow/collision flags lost when merging actors
OLD - Anim - Mar 24, 2017Information loss when merging actors such as cast shadow and collision. If one of the actors being merged has a different setting such as not casting shadows. This information will be lost and repla ...
[CrashReport] Assertion failure in NameTypes.h after CookOnTheFly
UE - Foundation - Core - Apr 25, 2017This is a top crash occurring for users in the 4.14 and 4.15 releases. Unfortunately no user-descriptions of the issue have been provided, so information is limited. Despite a different callstack, ...
Crash duplicating or deleting any component inside of Actor BP if lights or triggers are present
UE - Gameplay - Blueprint Editor - Apr 25, 2017When duplicating or deleting a component whilst a point light is also a component within an Actor BP, the editor crashes. See callstack for info. This is a regression. Working: 4.15.2 Broken: 4.16 ...