Editor cannot handle blueprint structure using an Actor Map variable

UE - Gameplay - Blueprint - Aug 28, 2017

If a blueprint structure contains a map variable with Actor Class Reference as the key, populating the map with a custom blueprint (ActorSet) and adding a variable of the structure to any other blue ...

GeometryScript_TextureUtils.sample_texture2d_at_uv_positions in python

UE - Graphics Tools - Modeling Tools - GeometryScripting - Nov 17, 2022

Licensee- "GeometryScript_TextureUtils.sample_texture2d_at_uv_positions does not work in python. The uvlist becomes nullptr from python to C++. BP is working fine." ...

Changing the default Child Actor Class of a ChildActorComponent results in any instances of the Blueprint in the level gaining an extra ChildActorComponent.

UE - Gameplay - Components - Nov 13, 2015

Changing the default Child Actor Class for a ChildActorComponent in a Blueprint after an instance of that Blueprint has been added to a level results in the instance in the level gaining an extra Ch ...

The hover state for a button is given instead of a click when using touch on mobile

UE - Editor - UI Systems - Oct 10, 2016

The hover state for a button is given instead of a click when using touch on mobile. The user must click twice to get the first button "Click" and the hovered state remains until the user holds ther ...

Projectiles do not register collision components if collision component is not set to root

UE - Gameplay - Dec 9, 2015

Projectiles do not register collision components if collision is not set as the root of the actor in the components pane. ...

Is Input Key Down does not work when Any Key is being checked

UE - Gameplay - Input - Jan 6, 2016

If the "Any Key" keybinding is used in the Is Input Key Down node, the node will never return true, even if any key is pressed. ...

Impossible to save assets after change in redirectors

UE - Foundation - Core - UObject - Dec 13, 2018

One of our licensees pointed out this problem. I've tried all the common redirector problems (write / read permission, multiple instances of the editor, renaming the assets, running the commandle ...

Pressing Play/Simulate on Window without Focus does not Function on Mac

UE - Platform - Apple - Jun 2, 2015

If a user attempts to 'PIE' within a window that does not currently have focus, the 'PIE' will not execute. The user provided a video on his answerhub post which illustrates the issue clearly. In ...

MAC: Mouse input does not aligned with the cursor when switching from windowed to fullscreen

UE - Platform - Apple - Jun 11, 2015

Mouse input is not aligned with the visible cursor when users switch from windowed to fullscreen. Input seems to be located to the left of the visible cursor. This prevents users from accessing any ...

The Error message "Failed to add Class "YourClassName". Failed to automatically hot reload the "YourProjectName" module." appears when adding a class to a C++ project

UE - Editor - UI Systems - Apr 22, 2015

Edit MattK: This is UserWidget specific. If we don't want users to extend this class we should figure out a way to prevent that in our wizards When trying to add a C++ class to a project the follo ...