Unreal Engine Issues

DebugEditor checkLockFreePointerList(TLS.NumPartial >= 0 && ((!!TLS.NumPartial) == (!!TLS.PartialBundle))) fails

Occasionally, the Engine/Editor crashes on startup with an assertion in the lock-free void pointer list. ...

"Assertion failed: NumberOfFreeBits >= 0" on clients that attempt to connect to a server with the -NoPacketHandler option

With the rework of IP address resolution in 4.25, this assert now occurs. When no packet handler is used, UPendingNetGame::InitNetDriver calls SendInitialJoin() immediately, before async address res ...

Exporting to FBx nanite staticmesh, export the low res fallback LOD 0

The exporter export the render data and the nanite render data is on the gpu and is not accessible, this is why it export the fallback mesh. Its more complex then it appear since we will need to do ...

Importing a 16x16km landscape at 0.5m resolution crashes Unreal (not enough VRAM)

[CrashReport]UnrealEditor-Chaos!Chaos::TEventContainer<Chaos::FCollisionEventData>::DispatchConsumerData() [EventManager.h:214]

Generated from CrashReporter Error Messages:Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 691] Array ind ...

Bounds location of apex destructible mesh will not be updated when added to sequencer directly from content browser

Destructible mesh's location will not be updated when added to sequencer directly from content browser, unless two different locations are keyed on the transform track of the mesh. We found the bug ...

Breakpoint on SetText node in WBP PreConstruct triggers editor hang on save

A user reported that when calling SetText on a text widget in a widget blueprint's PreConstruct causes an editor hang when you put a breakpoint on SetText and attempt to save the asset. The issue i ...

Enable Collision checkbox does not affect static meshes from static mesh editor when set to false

Setting the Enable Collision checkbox to false in the static mesh editor does not alter collision on static mesh objects. ...

[Bug] 4.7.0 preview 5: Cannot add events for the main component of the SkeletalMeshActor

In UE4.7 Preview 5, cannot add events for the main component of the SkeletalMeshActor. (see screenshot.) ...

4K Resolution and High DPI Scaling in Linux aren't completely affected by System Display Scaling

Unreal doesn't change appearance when changing system configuration display scaling options. Editor Texts are still quite small and don't change based on the Display Scaling %. This bug also causes ...