Unreal Engine Issues

Scrolling through the ListView inadvertently displays duplicate elements

When a ComboBox is set as elements in a ListView, it can see that the option is set to the wrong element when selecting the ComboBox.  ...

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 them be simulated individually. In the most common scen ...

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

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

Decals custom depth/stencil side effect from Lumen

The order of passes related to Decal rendering (without the DBuffer) and CustomDepth is changed by the CVar "r.Lumen.AsyncCompute", even when Lumen is not enabled. This causes Decal Materials that ...

Actor foliage does not respect "foliage.CullDistanceScale"

Actor foliage does not respect the "foliage.CullDistanceScale" console variable. This was brought up in a UDN: [Link Removed] ...

Nanite foliage doesn't respect "foliage.MaxEndCullDistance"

Nanite foliage static meshes do not respect the "foliage.MaxEndCullDistance" console variable setting. This was brought up in a UDN: [Link Removed] ...

[PCG] Handle potential deadlock case with UPCGLandscapeCache::GetCacheEntry

It is possible to get in a rare situation where PCG uses all Background workers while also having all its workers waiting on the FPCGLandscapeCacheEntry DataLock critical section. Since loading of ...

Ghosting effect of fast moving objects in Lumen

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.

Consider an actor defined in C++ with "bIsSpatiallyLoaded" set to true (the default), and a derived blueprint that overrides "bIsSpatiallyLoaded" to false. Now consider an actor instance of that blu ...

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

The Remove-On-Break (ROB) feature, set on Fracture Mode on Geometry Collections (GC), was supposed to make the particle shrink until it vanishes. When the GC goes to sleep the shrinking stops and sh ...