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Not a big issue, and doesn't cause any functionality issues, but for those of us a bit OCD it can be annoying.

Blueprints that include modules do not remember the module slots in use.
I made a blueprint of the top-left assembler with the modules, then placed it many times. Many different resulting module orders, none matching the original assembler.

Thanks for the report,

But its not really a bug, the proxy request (ie blueprinting the assembling machines) only guarantees they will try to insert the module, but makes no promises about what order they come in

(Also i think the random order looks cool)

A more realistic case is something like this.
Left column was as intended - right placed from a blueprint.

It's harder to tell at a glance on the right hand column if all the modules are as intended. I don't think of myself as hugely OCD but I rebuilt a column of assemblers twice before I realised it was the bots not preserving module order.