Unreal Engine Issues

Delta struct serialized fast arrays replicating new elements with no changelist

There is a scenario where delta struct serialized fast arrays can replicate changes that introduce additional elements to the array, but without changelists containing the new data. This needs furt ...

Certain UPROPERTY values are not updated during auto-recompile

Sometimes manual recompile is required to make a blueprint actually recompile data-only changes, but not always. If the last manual compile was with default values, then changes are not updated. If ...

Windows SDKs not recognized for HoloLens Development

This is a regression as the issue does not occur in //UE5/Release-5.1 @ CL 23901901 ...

Fix up IOS errors calling UI API from non-UI threads

Behavior Tree (BT) services added to root nodes call the initial tick twice

Behavior Tree (BT) services added to root nodes call the initial tick twice A BT Service with the setting "Call Tick on Search Start" enabled will execute the initial tick twice when added to the ro ...

Using nativized functions on buttons to spawn meshes causes assertion failure

An assertion failure is thrown when using nativized functions on an Android device. ...

Crash when using Export All or Export Selected (UE4Editor-UnrealEd.dll!ULevelExporterFBX::ExportBinary)

Relates to [Link Removed] [Link Removed] Call stack is similar to the bugs above. Editor will crash when exporting assets from a level that is not dirtied. Another reproduction method is to selec ...

Adding a Scene Capture 2D to Render Target will override Motion Blur settings in level

With a Render Target From Scene Capture 2D setup in a level , the motion blur settings from a global post process volume is overridden. Was investigating Scene Captures picking up Motion Blur when ...

Lighting behavior is unreliable for translucent lit materials, results are inconsistent depending on the editor camera's FOV and the editor viewport's width/height/aspect

When working on the level editor viewport or testing on PIE, the visual appearance of additive/translucent lit materials changes significantly (and abruptly) when varying the camera FOV or the viewp ...

If a user uses a binding to set the text of a Text widget by using the "Get Text" node on that same widget the editor will crash

The editor crashes when trying to set the text for a text block via a binding a if the text block is trying to set its text by referencing its current text setting. ...