A warning is needed for turning off "Update Navigation Automatically", large nav meshes can cause crashes

UE - AI - Jul 7, 2015

A warning is needed before allowing users to uncheck update Navigation Automatically. A user has done so and then created a nav mesh that was 1,000,000 by 1,000,000 in size and they can no longer op ...

Bug in ULevel::FixupActorFolders.

There is a potential bug in ULevel::FixupActorFolders() in the FixDuplicateFolders section: Suppose you have a folder hierarchy that looks like this:A B(1)B(2) C(1)B(3) C(2) where the letters ...

[CrashReport] UE4Editor_CoreUObject!UObjectBase::IsValidLowLevelFast() [uobjectbase.cpp:294]

UE - Foundation - Core - Aug 22, 2017

This is a common crash in the 4.16 and 4.17 releases. User DescriptionsWriting a custom component in C++. Hotcompiled it through VS2017. Had the BP editor open with a class derived from that compo ...

Meta Allowed Class Doesn't Allow All The Included Classes

Tools - Dec 24, 2019

The Meta Allowed Classes specifier doesn't allow the user to assign anything of the second type. Found in 4.24.1 CL#10757647 Reproduced in 4.23.1 CL#9631420, 4.25 Main CL#10868506 ...

Plugins are not creating shipping versions on package on Mac 4.23 Preview

UE - Foundation - Cpp Tools - Jul 15, 2019

When you try to package a plugin on Mac in 4.23.0 Preview 1 there is no Shipping folder generated. This was verified to not happen in 4.22.3 (via Epic Launcher). Found in 4.23.0 Preview 1 CL# 72363 ...

Traveling away from, then back to the original map in multi-process PIE with the editor as a client causes an assert

UE - Networking - Mar 28, 2016

An assert is triggered in this case because in multi-process PIE, if the editor is a client, the PIEInstance of the world context remains at -1 (see UEditorEngine::PlayInEditor). If this client inst ...

sphere collision with start and end points set to the same value return no hit objects

UE - Gameplay - Aug 29, 2016

Sphere collision with start and end points set to the same value return no hit objects. Workaround Set the end vector to 1 away from the start vector (0,0,0 to 1,1,1, etc.) Regression (no) issue ...

Stride Warping in manual mode not activating correctly based on first StrideScale

UE - Anim - Gameplay - Aug 15, 2022

From licensee: If StrideScale is 1 the first time through, it initialises the StrideScaleModifierState to 1 and doesn't require updating so leaves the CachedDeltaTime at 0 by never calling Update_I ...

Only 2 out of 4 Split Screen characters appear in TM-SplitScreen

UE - Gameplay - Oct 3, 2016

Only two characters appear in the playing field after hitting PIE. There are 4 separate screens, which I expected there being one character for each screen. 4 Characters used to spawn and now only 2 ...

Linking Error Happens When Trying to Inherit From TextureRenderTarget2D in C++

UE - Rendering Architecture - RHI - Jan 16, 2020

The engine has a linker error when trying to inherit from TextureRenderTarget2D. This seems related to https://jira.it.epicgames.net/browse/UE-5050. Found in 4.24.1 CL#10757647 Reproduced in 4.23 ...