Unreal Engine Issues

Merge actors in partitioned world dirties level

We've noticed that when we use the merge actors batch option, the partitioned world will get dirtied after the operation. This occurs in FMeshMergeUtilities::MergeComponentsToInstances: if(bAct ...

Using "Watch This Value" on Pawn causes memory leak

Reproduced 3/3 times, issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. No memory leak occurs when watching a new blank Actor BP, which implies the root cause ...

FBX sdk give wrong normals when compile with Visual Studio 17.4.1

At the time this Jira is created, UE 5.1 and 5.2 is using VS 17.3.6 which is working correctly. any update after should repro the issue. ...

datasmithAreaLightActor cannot be changed in editor

NiagaraEmitter using Grid 3D Template of NiagaraFluid plugin at coordinates greater than about 10.5 km is not displayed

Groom component created from Blueprint ignores "Forced LOD" on LODSync component

Regression: Issue occurs in //UE5/Release-5.0 This issue occurs with any Groom Asset created from a Blueprint. Other components work properly with the Forced LOD settings, as only the Groom does no ...

Crash after enabling iOS Metal Desktop Renderering and then enabling iOS SM5 Preview Rendering Level

Improper Initialization of trigger values when added at runtime with the key pressed already

See the comment on UInputTrigger::LastValue around issues being a bool type on first tick ...

SetOneWayInteraction functionality has no effect on the simulation

Calling SetOneWayInteraction on a BodyInstance has no effect within the physics engine. The state of the flag is passed in to Chaos but nothing actually uses the value once it is there. It is expe ...

Callback ID lost while using the webview

This is a licensee UDN: [Link Removed] I've reviewed the javascript/native bridge code and I don't see anything obvious.  The fact that it can happen on both mobile platforms might point at some hi ...