Import Vocoder19Bands and see what happens. Rectifier is allowed by the compiler, but the asset is no longer in the gui. You can't select it and if a Rectifier is in the ini list it will get ignored.
Tried it just now. Opened File > Examples > Audio > Effects > Vocoder19Band. Then copied all the audio instances and connections to clipboard. Clicked Import in the design tool and pasted.
Here's the result I see. The "Rect1" and other rectifier objects seem to import fine and are clickable.