Unreal Engine Issues

Enabling ChaosCaching plugin results in packaged game no longer opening

ChaosCaching plugin appears to break packaged games. No warnings/errors reported in the log or when attempting to open the produced .exe. My task manager does not show the game process running at al ...

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 ...

Sk mesh editor "Bone to Remove" is not update when removing bone in the SK skeleton editor

iOS build from Windows fails if your remote Mac shell is set to /bin/zsh

https://forums.unrealengine.com/development-discussion/ios-development/1696189-ios-launching-error ...

Spawning a Spawnables to a sub-level on the sequencer will spawn to Persistent Level in the case of Editor

This feature works fine on Runtime and is spawned to Sublevel. And, once we save the Level, it will be spawned actor to a sublevel even on the Editor. ...

Deterministic cooking issue caused by ParticleModuleTypeDataGPU

This problem is similar to the following case. [Link Removed] [Link Removed] It seems to have been fixed in 4.16, but the licensee reported it in 4.25. ...

Reflection looks Brighter on Mobile Preview than on PC

Relevant Ticket and UDN [Link Removed] [Link Removed] ...

UnrealEditor hangs at 96% when launched on Linux

Unshelving the CL's mentioned in the repro steps causes Unreal Editor to stall when loading up on Linux. Issue still occurs when the unshelved CL files are reverted. ...

UMG Animations on existing widgets break when loading new level

Marking as a regression as this does not occur in 4.25.4 User description: I want to have UMG UI that persists for the lifetime of the game so I create my root widget and add it to the viewport fr ...

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 ...