I am attempting to stack polygon features by creating multiple duplicates at once. I thought I could achieve this by using the Duplicate Vertical or Array editing tools and setting any of the offsets to zero feet, but when I hit Duplicate/Array, no additional features get created. It only works if the offset is greater than zero, but I need my features to stack exactly on top of each other with no vertical or lateral offset. Is this intentional or a bug? If it is intentional, meaning it's not possible to set the offset to 0 feet, then there should be some warning or the execute button should be grayed out.
I might be misreading your requirements but would selecting the polygons you want to duplicate, copying them out to a new dataset, and then repeatedly appending the copies back to the source solve your problem?
is it this tool?
Duplicate 3D features vertically—ArcGIS Pro | Documentation
and if so, it is offsetting vertically so you need to offset by a finite amount, and the x,y plane remains intact, only the z changes.
If you have a proposal to disable the tool if z is set to 0, then you can create an "Idea"