Unreal Engine Issues
Unreal Engine Issues
Render state for InstanceStaticMesh doesn't recreate after modification of instances list with RemoveInstance
UE - Gameplay - Blueprint - Sep 14, 2017When Remove Instance is called for an instance static mesh component, the render state is not properly updated, causing some of the instances to not be visible. Workaround: Forcing a call to PostEd ...
[CrashReport] Fatal error: Cast of nullptr to Object failed
UE - Gameplay - Oct 5, 2017This is a common and longstanding crash that has affected many users since at least 4.11. Source context not available (error in user code?). User DescriptionsI was duplicating a Set function in c ...
Grid Size adjustment shortcuts don't functions in blueprints
UE - Gameplay - Blueprint - Oct 5, 2017When the shortcuts for "Grid Size(Position):Decrement/Increment" ( '[' and ']' by default) are used in the main viewport editor, the grid size for a blueprint's viewport are updated as well. Howe ...
Camera rotation stops at game border when using Begin play node
Tools - Jan 8, 2018There is an issue where Camera rotation stops at game window border when using Begin play node with the mouse. This issue does not happen if you don't use the begin play node with the Set show mouse ...
Editor stalls on Mac after key up, mouse up
UE - Platform - Apple - Dec 19, 2019UDN user reported a performance hit on Mac with the latest Hotfix release when the user is interacting with the editor either through keyboard or mouse input. This performance hit is noticeable whe ...
Niagara Vector Field CPU access Error prevents its use in projects
UE - Niagara - Jan 31, 2020Niagara VectorFields do not function properly since "Fix CPU Access" changes are not persistently saved. After every Editor restart or reopening projects, the Niagara-VectorField driven Emitter and ...
Out-of-Bounds Access During Partial Updates of ISMC Per-Instance Custom Data
UE - Graphics Features - Jan 6, 2026When using instance custom data values, removing an instance and changing the number of custom data floats in sequence can cause an array-out-of-bounds crash. The underlying arrays are not resized ...
Crash report window does not open on GitHub source builds
UE - Foundation - Core - CrashReportClient - Jun 13, 2016When using a source build of 4.12, the crash report client window does not open even if Crash Report Client is manually built alongside the editor. UPDATE: Only affecting Source builds from Github. ...
SetMasterPoseComponent overrides any SetMorphTarget operations
OLD - Anim - Oct 16, 2015Using Set Master Pose Component overrides any Set Morph Target operations on the slave component. ...
LIVE: Transform Variable rotation not setting correctly
UE - Gameplay - Oct 21, 2014When trying to set the rotation value of a blueprint transform variable, changing the Y value will usually reset to 0 and change the value of X and Z as well. ...