Unreal Engine Issues and Bug Tracker

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Latest Bugs

Crash (Assertion failed "SystemInstanceController->IsSolo()") when enabling "Start with Tick Enabled" on a Niagara Component

Currently, Niagara Components are only expected to have their TickComponent() method called when their system is marked as "Solo", which makes...

A Packaged build that has had an Editor Only Component added to one of its Blueprints logs a false positive warning - USimpleConstructionScript::FixupRootNodeParentReferences()

UE - Gameplay - Components

A Packaged build that has had an Editor Only Component added to one of its Blueprints logs a false positive warning in USimpleConstructionScri...

Decals custom depth/stencil side effect from Lumen

UE - Graphics Features

The order of passes related to Decal rendering (without the DBuffer) and CustomDepth is changed by the CVar "r.Lumen.AsyncCompute", even when ...

In Standalone mode, when reading world partition actor descriptors for BP actors, "bIsSpatiallyLoaded" receives its value from the native base class instead of the BP class, so BP actors are loaded/unloaded based on the wrong condition.

UE - World Creation - Worldbuilding Tools - World Partition

Consider an actor defined in C++ with "bIsSpatiallyLoaded" set to true (the default), and a derived blueprint that overrides "bIsSpatiallyLoad...

The Remove-On-Break feature, set on Fracture Mode on Geometry Collections, stops shrinking and shows strange behaviors

UE - Simulation - Physics - Destruction

The Remove-On-Break (ROB) feature, set on Fracture Mode on Geometry Collections (GC), was supposed to make the particle shrink until it vanish...

Latest Fixes

Crash (Assertion failed "SystemInstanceController->IsSolo()") when enabling "Start with Tick Enabled" on a Niagara Component

Currently, Niagara Components are only expected to have their TickComponent() method called when their system is marked as "Solo", which makes...

iOS Quick Launch from the Editor no longer starts the app on device

UE - Platform - Apple

For some reason, iOS apps no longer launch on device when using QuickLaunch within the Editor. Instead, it does install the app onto the devi...

LidarPointCloud plugin causes crash on startup in packaged game on Mac

UE - Editor - Content Pipeline

[Interchange]: Skeletal mesh import do not take geometric transform

UE - Editor - Content Pipeline - Import and Export

We need to support geometric transform for meshes when importing skeletalmesh...

PCG Graph callback fails after compiling blueprint

UE - World Creation - Procedural Tools

PCG graph callbacks in BP do not appear to get called correctly after the blueprint is compiled. ...