GPU Particles Don't Spawn at Correct Location When Used as Collision Event Receiver

UE - Niagara - Oct 8, 2018

GPU emitter doesn't spawn particles at expected location when it is an event receiver. Also disabling Interpolate Spawning in the emitter properties affect this behavior as well, making the particle ...

Objects with centered pivots become Actors instead of StaticMeshActors when imported via Datasmith

UE - Editor - Content Pipeline - Datasmith - Exporters - Jan 18, 2019

When selecting "affect pivot only" and choosing "center pivot" on 56 objects in 3DS Max 2019, 4 of them imported into Datasmith as Actors and not StaticMeshActors. This makes it seemingly impossible ...

Breakpoints on nodes in deleted functions are not cleared

UE - Gameplay - Blueprint - Nov 16, 2018

Might be a simpler repro than this, but take a look at revision 1 of PreRolledBoxes in FortniteMain to see an asset affected by this. It was duplicated from StoreRoot which had breakpoints in some o ...

Overridden mesh values are lost when upgrading from 5.5.0/5.5.1 to 5.5.2 on blueprint skeletal mesh components

UE - Anim - Runtime - Jan 30, 2025

This issue is caused by the backout in 38341618.  The original code that went into 5.0 affects serialization by changing the UCS modified properties.  When upgrading, the override is lost because th ...

Editor movement control regression

Tools - Jul 8, 2015

Using Ctrl+Drag in 4.8 will not affect the location of selected actor if the viewport camera is facing away from selected actor. In 4.7.6 the actor would travel along the X axis even if the camera ...

Drastic increase in FBX import times from 4.9 to 4.10

Tools - Dec 9, 2015

The attached asset (including animation) takes 9 minutes to import in 4.10, where it takes 42 seconds in 4.8 and 4.9. You don't really notice this until you start to get up to larger assets or long ...

Physics are inconsistent between PIE and Standalone

UE - Simulation - Physics - Apr 16, 2015

A user has found that they are seeing differences in how objects are affected by physics in Stand alone as apposed to PIE. While testing the amount of force applied to an object in the different pla ...

EQS Query Not Detecting Different Floors

UE - AI - Jul 7, 2016

Running an EQS for something such as finding a random point on a grid will not generate results on multiple floors. See the attached screenshot for an example. Was unable to reproduce in 4.11.2 d ...

Split Pins in the AnimGraph become disconnected after Editor Restart

OLD - Anim - Sep 27, 2016

Split Pins in the AnimGraph of an Anim Blueprint become disconnected after Editor Restart Regression: YES. This does not occur in 4.12.5 CL:3039270 I also tested this in latest 4.13 Releases CL:3 ...

Dedicated Server crashes when client connects in particular circumstances

UE - Networking - Jun 9, 2016

Running a dedicated server with the setup in this fairly simply project causes a crash when a client connects. I'm unaware of the actual cause but getting the reproduction was all I could do. Logs ...