Unreal Engine Issues
Unreal Engine Issues
SButton and SBorder multiply color and opacity twice
UE - Editor - UI Systems - Sep 22, 2016Currently, the SButton and SBorder widgets multiply the color and opacity during OnPaint before calling the super (SCompoundWidget::OnPaint). This causes the operation to be done twice, since the co ...
[WorldPartition][CellTransformer] ISM Cell Transformer breaks component hierarchy when child component are transformed
UE - Engine Scaling - Streaming - World Partition - Dec 15, 2025This case is related to [Link Removed] Closed but is not a duplicate. Please make sure to download the attached project a ...
Copying and Pasting transform tracks creates a second transform track in Sequencer
UE - Anim - Sequencer - Dec 19, 2016When testing the new features in 4.15, i noticed that when copying and pasting a transform track in Sequencer, and pasting the transform track to an actor, it adds another transform track rather tha ...
Large blueprint memory leak in project
UE - Gameplay - Blueprint - Jan 6, 2015Attached project exposes memory leak in editor. Cause is not known but increases memory very quickly when running PIE. The amount of memory used does not return to normal after closing PIE and each ...
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 ...
Manually changing the value for Constraint Value 1 & 2 causes odd visual issues
UE - Simulation - Physics - Jun 1, 2016Changing the values that govern what bones a constraint is suppose to be a joint between (Constraint Bone 1 & 2) will cause issues where the transform widget is moved to an appropriate location but ...
Crash in Landscape Editor when clicking on Terrain Edit tools after undoing a Landscape swap
TM - Core - Oct 16, 2026Reported in SF [Link Removed] Twinmotion will crash when clicking on any of the Landscape Edit tools after replacing the Landscape and performing an undo operation This only appears to occur in th ...
REINST error pertaining to circular logic is unclear as to the cause of the error
UE - Gameplay - Blueprint - Dec 5, 2014The error messages for the REINST errors could be more descriptive. As of now the error does not appear to give enough information to the users to track down and solve the issue effectively. ...
Exporting data table adds memory address/serialization info to column names
Tools - Apr 26, 2016Exporting a data table as a .csv causes column names to be replaced with memory address/serialization information, making it extremely difficult to read information presented. Regression? (No), is ...
Event dispatcher cannot be deleted, removed, or renamed after placing a period in the name
UE - Gameplay - Blueprint Editor - Jun 7, 2017Event dispatcher cannot be deleted, removed, or renamed after placing a period in the name. In the case of the example given, the editor will throw a warning "No Delegate found for NewEventDispatche ...