Unreal Engine Issues

Crash when Saving Level after Successfully Building with Lightmass on Large Landscapes

A crash occurs when attempting to save a level after building static lighting for a large landscape. I was originally investigating a memory leak issue with landscapes, and the user provided the pa ...

AssetManager can load blueprints of the wrong type when redirectors exist

The logic in the AssetManager to determine if a scanned Blueprint should be added to the primary asset directory is wrong if that blueprint has an active redirect targeting it. The simplest way to r ...

Actors attached to Spring Arm with rotation lag avoid pitches of 90 and -90 degree

From User Bug Submission: When an actor/component (e. g. a camera) rotates around another object using the rotation lag of USpringArmComponent, it cannot rotate to the top or the bottom. At these ...

Set user focus for player 0 will cause other local players to lose input

When the player at index 0 sets its user focus it will cause other players to lose input. This does not occur when setting the user focus of players with an index higher than 0. ...

BUG IN CLIENT OF LIBDISPATCH: crash on KeyPress down in WebBrowser

FCEFWebBrowserWindow::OnKeyDown() InternalCefBrowser->GetHost()->SendKeyEvent(KeyEvent); is processed on the UE4 GameThread, inside the Chromium Embedded Framework (CEF) it appears to call a syst ...

Dragging and dropping new materials into Dynamic Material Instance slot results in crash

AttachComponentToComponent node does not change the location of a Spawned particle system at runtime

You can use the "Spawn Emitter Attached" function as a work around ...

Some debug modes do not work in PIE

It looks like the output of the debug pass is ignored, and the final output from the last frame before the pass was enabled is displayed instead. If the pass is modified to return a different textu ...

GameplayEffects: Inherited UAssetTags and UTargetTags do not update their referenced tags correctly with inheritance

When inherited, it is reasonable to expect the tags added by the parent to be reflected in the children. If the parent is editted after the children, however, tags that are added or deleted are not ...

[Interchange] Adding fbx file to monitored folder triggered legacy import

The import dialog window is the legacy one and not the Interchange one. Auto reimport of modified FBX seems to be working properly with legacy or interchange selected depending on the CVar Rep ...