Client PlayerState is null on joining online session

UE - Networking - Jul 31, 2015

APlayerController::ClientStartOnlineSession() checks PlayerState at the start of a game after loading a level. Due to time needed to load in, client player state may may return NULL ...

[CrashReport] Assertion failed: bIsRoutingPostCompilation == false [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\TextureCompiler.cpp] [Line: 245]

UE - Texture - Jul 25, 2023

Made From CrashReporter To remain Glitter compliant logs can not be linked from Crash Reporter. Should you need logs you will have to get them from Crash Report. ...

Planar Reflections Not Behaving As Expected in Splitscreen

UE - Graphics Features - Dec 19, 2018

This occurs in //UE4/Main @ CL 4670176 Not a Regression. This is similar to https://jira.it.epicgames.net/browse/UE-59149 but when adding more player characters it seems to change the planar reflec ...

Exponential Editor Slate Performance Cost When Editing An Asset With Nested Instanced Structs

UE - Editor - Workflow Systems - Feb 20, 2024

UDN Issue: [Link Removed] ...

Niagara and Groom causes exception crash on Launch when using

UE - Simulation - Physics - Mar 2, 2020

Trying a Launch after every step shows that the problem occurs as soon as the GroomAssetSystem is added to Niagara. If the GroomAssetSystem is removed, the game launches fine (but the hair doesn't m ...

Widget "Listen For Input Action" executes on unexpected input event

UE - Editor - UI Systems - Feb 19, 2020

Listen For Input Action firing erroneously. Confirmed in 4.26 MAIN @ CL 11536993 ...

UnrealFrontend doesn't package client and adds both -noclient & -client argument when both server and client is selected to be packaged in same profile

UE - Platform - Apr 15, 2022

Repro Ratio: 4/4 Regression tested in //UE5/Release-4.27.2 CL-18416816 and this issue DID NOT happen. When looking at the log output of the Project Launcher, the command that is ran is:-ScriptsFor ...

AbilitySystemComponent::NotifyAbilityEnded Can Crash due to Callbacks Invalidation Specs

UE - Gameplay - Gameplay Ability System - Oct 11, 2023

Pasting from the UDN: Unsafe code in AbilitySystem can lead to crash when granting an ability inside OnAbilityEnded Hello. We just ran into a crash. After investigation, it seems to be caused by ...

Camera Movement is laggy while the mouse button is held down and ShowMouseCursor is enabled if there are AI moving

UE - Gameplay - Dec 15, 2015

Camera Movement is laggy while the mouse button is held down and ShowMouseCursor is enabled if there are AI moving. Stat Scene Rendering didn't show any jumps while moving the camera under these cir ...

Cannot add Instanced UObjects to ActorComponents who belong to Actors placed in the level.

UE - Gameplay - Blueprint - Aug 9, 2016

When a Actor Blueprint is placed in the world with a TArray of instanced UObjects, the + button to add a new instance of the object wont create a instance of the object. ...