Get mouse X/ Get mouse Y returns zero after the user clicks the screen and mouse is shown

Tools - Mar 28, 2016

If the user has set show mouse set to true and clicks the screen the Get mouse x and Get mouse Y will no longer return anything other than 0.0 Additional notes: This does not appear to be a regress ...

Sounds not obeying Audio Volume Ambient Zone Settings

UE - Audio - Aug 31, 2016

Exterior Ambient Zone Settings are ignored by sounds played that are placed within the Audio Volume. As the documentation suggests, Ambient Zones define how Sound Actors located inside the associat ...

Asset values change when the Editor is out of focus when using Maya or Web Browser

Tools - Jul 18, 2018

When switching between any open software (Maya, web browser) and UE4 while Simulation is running, sometimes the values change on the asset and it starts to oscilate between <-0.6,0.6> or any other s ...

Crashes when copying an array of actors that implement an interface into an array of interface references

UE - Gameplay - Sep 17, 2019

When assigning an array of actors that implement a specific interface to an array of the specific interface the engine crashes. This doesn't happen if the actor array is put through a for each loop ...

Cached component instance data transform did not match! Warnings in Content Examples

Docs - Samples - Oct 27, 2016

Lighting is unbuilt in all levels in Content Examples. Multiple warnings appear in the log "Discarding cached lighting data which will cause lighting to be unbuilt" LogStaticMesh:Warning: Cached co ...

Material Parameter Collections are not working on Android v 5 phones from 4.11

UE - Platform - Mobile - Feb 9, 2016

Material Parameter Collections are not successfully passing stored values into Materials when packaged for an Android Phone with an OS version of 5. Both version 4 and 6, correctly use the MPC.Test ...

Scaling snap for selected object are reset to the origin of the scale pivot location

Tools - Apr 27, 2016

When scaling multiple selected actors in the scene with snap enabled the actors will reposition to the pivot origin of the last selected actor in the group when going down to a value of 0 or a negat ...

HideBoneByName translates bone to parent which breaks skinning

UE - Anim - Jul 30, 2024

Calling HideBoneByName on a bone causes that bone (and all it's children) to be translated to the parent bone's location.  This code in UpdateRefToLocalMatricesInner is responsible: bool bNeedToHid ...

Crash occurs loading a sublevel containing landscape with ray tracing enabled

UE - LD & Modeling - Terrain - Landscape - May 13, 2020

In raytracing enabled, When loading a sublevel containing landscape with LoadStreamLevel function following error is shown. Assertion failed: Pair != nullptr [Link Removed] [Line: 584] Licensee re ...

Unreal Studio: Multi User Viewer Template Menu: Next Arrow Bug

UE - Anim - Sequencer - Oct 11, 2018

"There's a bug with the menu where you cant get to the next step (server browser or host) when you have a VR headset plugged and available. The "Next_Btn" button is greyed out on the last step. You ...