Unreal Engine Issues

USceneComponent::AttachChildren entries overwritten on Client with NULL

The issue occurs if a non-replicated actor is attached to a replicated scene component on the client, and then the same is done on the same scene component on the server. The attached actor does not ...

BuildPatchTool doesn't finish if enabled building Http Chunk on Mac

We may fix this issue by the following codes. FPakPlatformFile::FPakPlatformFile(): LowerLevel(NULL) ,bSigned(false) { // remove //FCoreDelegates::GetRegisterEncryptionKeyMulticas ...

Variables changed in RecastNavMesh Generation tab do not save

Confirmed this issue in 4.25.4, 4.26, and 4.26.1 therefore it is not a regression. Uploaded logs from 4.25.4 and 4.26.1, the backup logs are before the restart (step 5 in repro steps) ...

Scene Color node with UV input on a transparent material renders incorrectly in stereo

From Licensee: When we have Instanced Stereo enabled, all our materials that use Scene expression nodes (SceneDepth, SceneColor, etc...), render incorrectly in the right eye. It only happens to the ...

Calling TearOff then Destroy on an actor results in client actor also being destroyed

When calling TearOff followed immediately by Destroy, the channel will be closed with the reason that the actor was destroyed, so the actor will be destroyed on the client as well. In the UDN linke ...

Data validation FAILED due to IWBE_Blutility containing invalid data

4.26[AssetLog] D:\Binary\UE_4.26\Engine\Content\Tutorial\InWorldBlueprintEditing\TutorialAssets\IWBE_Blutility.uasset: Default__IWBE_Blutility_C is not valid. See the MapCheck log messages for detai ...

DateTime Variable in Sub Widget resets on Compile

When attempting to set the default value of a date time in a sub widget the changes are not kept after compiling. ...

NPC - Initializing a System parameter to a Niagara Parameter Collection data interface parameter does not work

Initializing a System parameter to a Niagara Parameter Collection data interface parameter does not work ...

The CVar r.Tonemapper.GrainQuantization doesn't work and the GrainQuantization is always on

Fbx import has some scale differences

A licensee has forwarded an fbx that came out of Nuke. I think the animation is importing into Sequencer correctly, but the objects seem to be scaled. If I take the fbx into Maya and then reexport i ...