Improvements to Undo/redo button with smart objects will be availaible in upcoming release. OUS uses Microstation graphical engine with a project database. Unfortunately, design history histoic undo/redo functions do not interact with data in the OUS Project Database.

Attached video demonstrates the upcoming improved Undo/Redo functionality for smart objects.

Added a video explaining the way "Design History" Works in Plain MicroStation (including for Database operations like the MicroStation Undo also does). Maybe that can inspire Substation Product Management. Thanks