Unreal Engine Issues

Inconsistent behavior with spawned actors when Play, Pause, and Stop are called in a Level Sequence Player

This is a report about three different issues that are tightly related to each other, so I decided to include them in a single report. The behavior of actors spawned by a Level Sequence Player is no ...

Unfocused Standalone window has reduced performance

User description: When I run two windowed standalone instances to test multiplayer, the unfocused window gets about 2-5 fps...but if I focus on it, smooth 120fps, yet the opposite screen is now onl ...

Crash on Adding Texture Samples with modified BasePassPixelShader.usf

In 4.8.2 QA Build - Making the changes to BasePassPixelShader.usf listed below, adding two texture samples and then using the Preview Arrow toggle on the add node will hard crash the CPU, requiring ...

Media Sound Wave Does Not Play after Packaging

After testing multiple different ways to get a Media Sound Wave to play in sync with the associated Media Player Asset, I feel it is very hard to get the sound to even play. Not mentioning getting i ...

Crash While Compiling Blueprint in FBlueprintEditorUtils::RefreshExternalBlueprintDependencyNodes()

Having an actor blueprint (A) that contains an array variable of references to another actor (B) that is connected to a Length node and a Vector array that is connected to a ForEachLoop causes bluep ...

D3D HUNG crash with Aftermath result: CullLights

This is a specific subset of D3D HUNG crashes from [Link Removed]. This JIRA is for the crashes with the following results from Aftermath: [105]LogRHI:Error: [Aftermath] Status: Timeout [105]LogR ...

Crash retargetting AnimBP with "Allow remapping to existing assets" enabled

4.12 version of the crash: [Link Removed] Error message: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 833] Array index out of bounds: 1 from an array of size 0 Sourc ...

WP HLOD Crash on Small Cell Sizes

[CrashReport] UE4Editor_Engine!FDistanceFieldAsyncQueue::Build()

This is a common crash callstack that has affected more than 300 unique users since at least the 4.11 release. Other Jiras in the past with similar callstacks include [Link Removed] and [Link Remo ...

Editor crash on loading a project after enabling the Tango plugin on Linux

Enabling the Tango plugin on Linux causes the editor to crash on restart. Regression: No - Tango plugin not available in 4.16.3 (CL 3561208) ...