Unreal Engine Issues

Editor will crash on attempt to load a previously-saved Blueprint asset with a serialized default subobject containing a serialized static array of two or more nested subobject instances.

A crash will result if a Blueprint class that's based on a native C++ class containing two or more nested, explicitly-instanced subobjects referenced by a fixed-size object array property are serial ...

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 ...

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 ...

StaticMeshEditor - "Generate UV" tool no longer works

Anim Notifies and Curves are removed when saving Linked Animation Sequences through Sequencer

Found from AnswerHub: https://answers.unrealengine.com/questions/1005466/view.html ...

Ensure playing a sequence that has an event trigger that calls SetPlaybackPosition

https://answers.unrealengine.com/questions/1003504/loadsequence-and-where-is-setplaybackposition.html ...

Setting Texture Object within Niagara fails to update texture

Based off of a saleforce ticket, it seems that reinitializing a niagara system with an updated texture, the texture does not update. The setup works correctly in 4.25, so marking as a regression. ...

[Soundfield Submix][Crash] - Unreal Ambisonics Crashes on Packaged Game and in Standalone

Issue was reported by a user on the Unreal Engine forms. I tried to package the game with the other encoding options and this appears specific to using the Unreal Ambisonics option.  I have only co ...

Vulkan RHI when execute the node "Create Render Target 2D" when enabling the option "AutoGenerate Mip Maps"

Unreal Crash in with Vulkan RHI when execute the node "Create Render Target 2D" with the option "AutoGenerate Mip Maps" then execute "Draw Material to Render Target" Opening the project also opens ...