When using the auto layout tool the spacing does weird things with mm increments (e.g. 3.5 spacing is spread farther than 4.0), and the automatic infill in settings goes into a loop if you select all cloned objects. I'm not sure if the video attached correctly, but it shows examples.

https://i.imgur.com/edYurGF.mp4

Edit: Nope, can't upload, but there's a link.