Hidden enumerator variables can cause the enumerator to become broken with the Select node in blueprints

UE - Gameplay - Blueprint - May 26, 2015

If a user makes an enumerator in C++ and sets one of the variables to Hidden and doesn't make it the last variable of the enum, it will cause issues with the numbering of the enum when using the Sel ...

[StateTree] Reentering current state immediately after exiting does not reset variables on tasks with "Should State Change on Reselect"

UE - AI - StateTree - Nov 7, 2024

Context State Tree Tasks have a configurable default value 'Should State Change on Reselect' which controls whether the task receives a EnterState/ExitState if completion of the current state is fo ...

Crash when attempting to save Soft Object Reference

UE - Gameplay - Blueprint - Aug 13, 2018

Engine will crash when attempting to save soft object reference. "FArchive does not support FSoftObjectPtr serialization. Use FArchiveUObject instead." Also reproduced in Main CL #4247864 ...

Reliable multicast RPCs can be dropped

UE - Networking - Dec 23, 2015

As detailed in the linked UDN thread, if a server doesn't receive a network packet from a client in 1.5 seconds, it sets the client connection's ViewTarget to null. This will cause dropped reliable ...

Cannot Add Player with a second controller in Lyra

UE - Gameplay - Input - Feb 24, 2023

Controller 1 is able to navigate the menu as normal, but if you hit the "Start" button on Controller 1, it'll flash the Add Player UI element but won't connect as Player 2, and the output log will s ...

Changing the "Color Vision Deficiency Preview Type" setting under "Editor Preferences" does not work

Tools - Sep 11, 2017

Making changes to the "Color Vision Deficiency Preview Type" under the "Editor Preferences" does not change the Color Vision Preview. Regression: Yes Works in: 4.16.3-3561208 Does not work in : ...

Character Using Move to Location or Actor Stutters

UE - AI - Jun 9, 2016

Characters using Move to Location or Actor will briefly pause with each few steps during their movement. This did not occur in 4.11.2 binary, this is a regression. Found in 4.12.1 binary. Reproduc ...

Oculus controllers are hidden in Collab VR template

UE - Platform - XR - Dec 2, 2019

Oculus Rift motion controllers aren't visible and don't respond to button input from the controllers in Collab VR. Found in 4.23.1 CL#9631420 Reproduced in 4.24 Preview 4 CL#10387632, 4.25 Main CL# ...

Create Comment from Selection Option Not Working in Behavior Tree

Tools - Jun 8, 2016

In a behavior tree, while having multiple nodes selected, using the Create Comment from Selection option does not create a comment box as expected. Found in 4.12.1 binary. Reproduced in 4.11.2 bina ...

Linux Vulkan editor crashes OOM on older graphics cards

UE - Graphics Features - Oct 19, 2018

Vulkan editor is very crashy on older cards due to memory pressure. I have to switch to OpenGL to work on the unrelated bugs. I'm attaching the details of the particular failure I had (see VulkanMe ...