This is the worst part, I don’t know how to reproduce the issue. I am duplicating the actor by just dragging some actor in the viewport while the ALT key is being pressed. I am not using more than one layer. When it happens, if I restart the editor, more properties lose it’s values.
My conclusion is: the issue doesn’t happen when the editor is restarted. It happens before. But we see bigger consequences when the editor is restarted.
I was using 12.5, I changed to 13.0 today. Without any hope…