Cannot Delete Event Dispatcher inside of a child blueprint when the parent has an event dispatcher as well

UE - Gameplay - Blueprint - Apr 2, 2015

If the user creates two blueprints and parents one to the other and then creates 3 event dispatchers in total between the two in an alternating method it will cause and error and the event dispatch ...

Character blueprint tick function does not behave properly

UE - Gameplay - Jul 2, 2015

Character tick event will continue to trigger even if Start with Tick Enable is set to false. Workaround: Setting "Set Actor Tick Enable" to false on Begin Play will prevent the tick event from t ...

MakeEditWidget specifier does not create edit gizmo in blueprint editor

UE - Gameplay - Blueprint - Jul 27, 2015

Using the MakeEditWidget specifier inside a UPROPERTY macro and creating a blueprint based on the class will show the translation gizmo inside the main editor viewport but the gizmo will not show up ...

Launching onto HTML5 fails due to a TypeError

UE - Platform - Mobile - Oct 6, 2016

Launching onto HTML5 will fail during the compiling stage. The following error will occur when the project is launched in the browser and begins compiling: Uncaught TypeError: Browser.mainLoop.sche ...

Landscape Collision Offset with Visibility Mask

UE - Graphics Tools - Terrain - Landscape - Oct 12, 2016

Landscape Collision is offset when using the Landscape Visibility Mask. If you paint a hole within the landscape and use the Third Person Template character to walk over the holes, the character wil ...

Precomputed AO Masks cannot be used to LERP between Normal Maps

UE - Graphics Features - Sep 18, 2015

When using the Precomputed AO Map node to LERP between 2 Normals, only the A input into LERP will render out on the mesh. The Precomputed AO will work fine for Base Color LERPs Example: [Image Re ...

iphone7+ Does Not Get Correct Device Profile Selected

UE - Platform - Mobile - Nov 16, 2016

When launching to iphone7+ the incorrect device profile will be used for device profile settings. ...

Take recorder does not record detachment and multiple attachments correctly.

UE - Anim - Sequencer - Jul 14, 2020

Recording attachment will can add multiple sections to an attach track in Take Recorder. ...

Spawning Actor from existing Actor which has a procedural mesh causes crash.

UE - Gameplay - Oct 17, 2016

If SpawnActor is used with a class of an existing Actor that has a Procedural Mesh, the game will crash. ...

checkSlow hit when using array with replication condition in Iris

UE - Networking - Iris - Dec 12, 2023

For arrays, FPropertyReplicationStateDescriptorBuilder::IsSupportedProperty will set the FMemberProperty's ChangeMaskBits to "1U + FPropertyReplicationState::TArrayElementChangeMaskBits". If the arr ...