Replication issues & warnings if a client hitches while the server seamless travels

UE - Networking - Jul 28, 2020

If a client hitches while a server performs a seamless travel, the client will get multiple lines of logspam of these warnings:Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/ ...

A pawn with collision set to overlap does not spawn inside a blocking volume with collision set to block.

UE - Gameplay - Sep 10, 2015

When attempting to spawn a pawn (with collision set to overlap) inside a blocking volume (with collision set to block), the pawn will actually spawn at the closest available point outside of the blo ...

Possible incorrect logical operator used in if statement in OnlineSessionInterfaceNull.cpp

UE - Networking - Dec 31, 2014

A user pointed out a possible mistaken use of the && operator instead of the || operator in an if statement in source code. In the FOnlineSessionNull::GetResolvedConnectString() function in OnlineSe ...

Nullptr dereference in FHeadMountedDisplay::UpdateSplashScreen()

UE - Platform - XR - Apr 5, 2017

A customer has had problems running a game with a splash screen when passing -game flag to the editor. UpdateSpashScreen will call GetCurrentFrame, which can return a nullptr but fails to verify it ...

While casting to a Child, the overridden function node's target will read the parent bp

UE - Gameplay - Blueprint - Apr 17, 2015

While casting to a Child, the overridden function node's target will read the parent bp. Also being discussed in this Forum post: https://forums.unrealengine.com/showthread.php?66846-Initialisin ...

Vulkan leaks memory when opening and closing windows

UE - Rendering - Architecture - RHI - Nov 22, 2019

As described here: https://udn.unrealengine.com/questions/532725/index.html (1) Start Prebuilt Vanilla 4.23.1. with Vulkan enabled (2) Create a new project (3) Drag and drop the Sphere from “modes ...

Connection to dedicated server no longer works on iOS devices

UE - Networking - Oct 11, 2019

"Looks like the cause of this is commit fb473a7 ( https://github.com/EpicGames/UnrealEngine/commit/fb473a7678c3669bebe0431dacaf52bcf8dee47f#diff-e6f727710008f31c0ece339b76041d2e ) included in v4.23. ...

Setting a delegate in code as constant does not compile

Docs - Aug 28, 2015

Using the wiki documentation to setup a Dynamic Delegate in code gives compile errors that the DelegateName doesn't exist. Adding the open/close braces ("[" and "]") give a different compile error ...

FGameProjectHelper::GetAvailableMaps() doesn't get all available maps

Tools - Aug 17, 2017

This function hardcodes Game/Content/ and optionally includes Engine/Content to search for maps to cook. This means that you cannot select a map from a content plugin to cook. Instead the code shoul ...

SSH remote toolchain does not consider load of target Mac

UE - Platform - Mobile - Sep 5, 2017

As mentioned here: https://udn.unrealengine.com/questions/389863/compiling-on-mac-through-visual-studio-on-pc-is-ha.html The SSH remote toolchain does not consider how many other users are connect ...