Unreal Engine Issues
Unreal Engine Issues
Set Hardware Cursor doesn't refresh when clicking and holding in PIE when dragging out and back in
UE - Editor - UI Systems - Slate - Nov 10, 2017The SetHardwareCursor function sometimes doesn't update when clicking and holding the left mouse button on a widget component, like a button, and causes the cursor to default back to its normal icon ...
bIgnoreAllPressedKeysUntilRelease only applies to keys in the previous mapping
UE - Gameplay - Input - Jun 16, 2022This is because the RebuildControlMappings function only checks this flag when you have a mapping that was already added, we should apply this for any new mappings as well. I'll update the repro s ...
Adding a water island when substrate is true will flatten the landscape
UE - Graphics Features - Substrate - Jul 20, 2023When a landscape weightmap or heightmap update is required, ALandscape::ResolveLayersTexture is called via the ALandscape::UpdateLayersContent() The problem appears to be that all pixels in the Out ...
Setting a poseable mesh component as leader component for a skeletal mesh component causes an access violation.
UE - Anim - Runtime - Jun 11, 2024When a skeletal mesh component's leader component is set to a poseable mesh component, the application will run into an access violation when it tries to update animation curves and morph targets. ...
Copy-pasting custom property nodes (ControRig etc.) results in invalid bindings, perf issues
UE - Anim - Rigging - Control Rig - Jul 28, 2025From this UDN: [Link Removed] Suggested fix:Override PostPasteNode to perform the GUID update andAdd validation on load to strip 'invalid' copies that do not correspond to a valid pin input ...
Curve Debugger window is broken when viewing curves in the Anim Sequence editor
UE - Anim - Runtime - Oct 15, 2025The curve debugger is currently broken when viewing curves on anim sequences. It seems that only metadata/skeleton curves are displayed, and those aren't updating correctly or showing their type (m ...
Margin Variable cannot be edited while collapsed within a data table
Tools - Feb 4, 2016If a struct has a variable of type Margin and a data table is created based on the struct, the Margin variable will not be editable while collapsed within the data table. ...
Array node input changes to pass by reference when editor is closed and re-opened
UE - Gameplay - Blueprint - Mar 23, 2015Closing and re-opening the editor changes the input element on add array nodes to a pass by reference. Update: This also occurs on Set Array Elem node Item output. ...
Widgets will not continue to tick when out of view
UE - Editor - UI Systems - Oct 20, 2015If the player uses Event tick to set the position of a widget blueprint with in the viewport and the widget then leaves the bounds of the viewport the widget will then no longer update so that it ca ...
Client lag/hitch detection can cause server to tick character faster than expected
UE - Gameplay - Player Movement - May 3, 2016If client takes a long time to send a move to the server, the server erroneously ticks it for a large time without updating the client's timestamp, causing the server to move the client further than ...