Reparenting a UserWidget within that widget's events can break links between UWidgets and their SWidget.

UE - Editor - UI Systems - Nov 28, 2016

Reparenting a widget within it's own event can cause that widget's tree to have null references instead of references to slate widgets. This happens because when a widget is reparented, we remove a ...

Off screen nodes snapping back in to place after alterations in blueprints

UE - Gameplay - Blueprint - Feb 16, 2015

After deleting a node, other off screen nodes tend to snap back into place when panning across the blueprint. ...

Niagara Simulation Stage + DynamicMaterialParameters crash

UE - Niagara - Feb 6, 2021

deleting the code "&& SimulationStages[i]->bEnabled" in UNiagaraEmitter::GetScripts will bypass the problem [Image Removed] ...

Adding a widget to the designer tab will cause all animations to pop back to frame zero regardless of the position of the scrub bar

UE - Editor - UI Systems - May 7, 2015

If the user adds another widget to the designer tab any animations that are available will pop back into what ever setting they have at frame zero regardless of the position of the scrub bar. ...

Cannot place static mesh in location if foliage mesh is already placed in same location

UE - World Creation - Worldbuilding Tools - Foliage - May 12, 2015

If a foliage object is already placed in level at a location, it will delete any static mesh that is placed in the same location. ...

Target build folder does not clear when repackaging

UE - Platform - Mobile - Nov 6, 2015

When repackaging the same project over and over again for HTML5, the Utility.js folder doesn't delete/clear during the repackaging process like it's suppose to. ...

Can Not Skip to Next Frame in Animation Composites

OLD - Anim - Nov 28, 2017

Within a new Animation Composite, the To Next and To Previous buttons do not move to the animations next or previous frame. ...

VR mode does not appear to work in stand alone (4.10)

UE - Platform - XR - Nov 17, 2015

If the user plays in stand alone and uses the short cut Alt+Enter, the VR mode does not kick in as expected ...

NavModifierComponent doesn't work well with dynamic owner actors

UE - AI - Mar 12, 2015

When a raw NavModifierComponent gets added to a character it cuts a hole in the navmesh (as expected) but doesn't update the location with character's movement. And it should. ...

User cannot undo creating or removing Preview Scene Profiles

UE - Gameplay - Aug 2, 2016

You cannot undo deleting or creating a Preview Scene Profiles. Destructive actions must atleast have a warning indicating they cannot be undone if this is as designed. ...