Unreal Engine Issues
Unreal Engine Issues
Clicking and dragging on a Widget component of an actor that spawns a copy and deletes it's self can cause a crash
UE - Editor - UI Systems - Jun 24, 2015When a widget component is clicked and dragged upon rapidly and that widget creates a copy of it's self and destroys the previous version it can cause a crash. ...
Sequencer - When a subsection has negative play rate, any nested sub-subsections fail to evaluate
UE - Anim - Sequencer - Jul 3, 2025Consider a sequence hierarchy with more than two layers. If the top-level sequence uses a negative timescale on a sub-sequence, the contents inside it animate as expected, but any nested sub-sequenc ...
UMG Viewmodel Plugin -- When setting up View Bindings, several arithmetic and comparison functions are missing from the "Conversion Functions" list
UE - Editor - UI Systems - UMG - Mar 20, 2026When setting up View Bindings from the "UMG Viewmodel Plugin" on a Widget Blueprint, it is possible to select a compatible "Conversion Function" from the list of available bindings. By default, the ...
Ensure When Pasting Timeline Node that was Previously Connected to a Node into a Function
UE - Gameplay - Blueprint - Nov 4, 2016An ensure is occurring when pasting a timeline that was once connected to a node into a function in blueprint. Regression: No, this also occurs in 4.12.5. ...
Blackboard interaction crashes engine
UE - AI - May 15, 2015User Description: "I'm trying to implement AI and following zoombapup's Guard AI YT tutorials. Whatever I do within Blackboard crashes the engine. Yes even a single click on Self key. Here's the dum ...
Changing hierarchical instanced meshes' transforms on tick spams output log with warning
UE - Graphics Features - May 27, 2015When several Hierarchical Instanced Mesh Components are spawned and then their transform altered on tick, the log is spammed with the message: LogStaticMesh:Display: Discarded foliage hierarchy of ...
Changing the scale of the widget reflector makes it harder to select actors in the viewport
Tools - Dec 29, 2014When changing the scale of the widget reflector it changes the scale of the selection bounds of actors in the viewport. Example: When hovering over a box at a 2.0 scale I will select the wall someti ...
PIE after the Game Instance's parent has a wire disconnected, compiled, then reconnected crashes this project
UE - Gameplay - Blueprint - Sep 18, 2015This user's project crashes on PIE after the Game Instance's parent has a wire disconnected, compiled, then reconnected. Possibly related to [Link Removed], but the call stack is slightly different. ...
Crash when Changing Source File and Re-Importing Mesh used in Mesh Particle System
UE - Graphics Features - Aug 2, 2016A licensee has reported a crash when re-importing a mesh being used within a Mesh Particle system. Regression? Yes, this crash does not occur in the 4.11.2 binary release. Link to Crash Logs: [Lin ...
User cannot undo the automatic changing of Mobility settings
Tools - Sep 12, 2016When the users causes a component to automatically change its Mobility setting by changing that setting on a parent or child component, undoing that change only affects the manual change caused by t ...