Replacing a Widget and then reusing it's name for another widget will cause a crash

UE - Editor - UI Systems - Jun 4, 2015

The user named a border "background" then replaced it with a canvas panel. After this they made an image and named it "background" and this cause a crash. Some kind of naming conflict. ...

Renaming the function for a bound event will cause the event to stop working

UE - Editor - UI Systems - Jun 26, 2015

A user found that when renaming a binding for a mouse down event for a border widget that the event would no longer fire off. They only worked as long as the default name was used. ...

Users are unable to create projects when the default project location is a networked drive

UE - Editor - Workflow Systems - Oct 23, 2024

There have been multiple reports of this issue, particularly from schools, over the last 10 years:https://forums.unrealengine.com/t/invaild-folder-path-with-network-user-drives/283475https://forums. ...

Uninitialized Critical Section exception error in Niagara/VectorVM when gflags application verifier enabled causing potential Memory Corruption

UE - Niagara - May 25, 2021

The following is posted from the user who submitted this issue: We noticed a crash happening in a certain area of our game, and the debugger showed it appeared to be attempting to free an invalid m ...

Values are not copied for a EnumArray that is part of an exposed Struct Variable

UE - Gameplay - Blueprint - Jun 21, 2016

Values are not copied for a EnumArray that is part of an exposed Struct Variable; when copying from the Details panel to a copy of the same actor. User Description: If you make an array of custom ...

Animation metadata with an instanced subobject will display "Multiple Values" for all fields when recompiled

UE - Gameplay - Blueprint - Dec 13, 2018

Animation metadata doesn't seem to properly support metadata with instanced subobjects, and breaks upon recompile when the data is reserialized. This seems similar to [Link Removed] and the other is ...

Move move events on widgets displayed via WidgetComponent will be offset in Standalone

UE - Editor - UI Systems - Slate - Aug 9, 2019

It appears the custom hit testing logic of WidgetComponent handles click positions well via UWidgetComponent::GetHitWidgetPath adding virtual mouse coordinates to the arranged widget, but mouse move ...

Rare assertion comes up when cooking if sequencer camera track has only additive transform track

UE - Anim - Sequencer - Mar 2, 2020

If a camera track has only additive transform track, some functions return uninitialized F3DTransformTrackToken made by default constructor. It causes a rare assertion. Please take a look at F3DTra ...

Building a patch from the project launcher will crash unrealpak when pak encryption is enabled

UE - Foundation - Core - Mar 2, 2020

When using unrealpak to make a patch, if the source pak data that a patch is based from is encrypted, you must specify the "patchcryptokeys" parameter on the command line so unrealpak knows which cr ...