Hello, no this behaviour wasn't planned, sorry about that. I'll look into as soon as I can.
However I do have a work-around for you
In the replay you showed, the Game Parameters are
Now if you open up the "expert" options panel in the IDE and replace the text by
(remove boxes line)
You will get the exact same item disposition.
The panel I'm talking about looks like this:
This is due to an oversight of mine. When starting a new game, a seed is generated. Then this seed is used to generate a random number of boxes. If the number of boxes is already set in the input, the generation is skipped and therefore the rest of the randoms will all be different. This is something I can easily fix once I get round to it.
Hope that helped.