How to reproduce:

• put down a compakt circuit, load some model.
• create a blueprint that contains exactly that circuit. E.g.

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

Load the blueprint into https://burnysc2.github.io/Factorio/Tools/DecodeBlueprint/ - The compakt circuit has a tag with the blueprint for the model.

• Duplicate the blueprint, save to inventory.
• right click the blueprint, then select "new contents for blueprint". Select exactlyt the same compakt circuit again
• export the blueprint:

0eNqt1VFvgyAQAOD/cs/YDAQU/8qyLNaRhayCAWxmjP99qGn3MEuc9JHz7tMch4xwvvSys0p7qEZQjdEOqtcRnPrU9WWO+aGTUMFVWd+HCAJdt3NgzcgITAiU/pDfUOHpDYHUXnklV2ZZDO+6b8/ShoR7dWParv7yjbJNr3ymTGfmb0DQGRfKjZ5fHciMnQrBy4IhGEL9iYmCM07YNKE/OknWsRAEh+WWnh/Rc1HSfBdPD/A7WPZ/lt6bvMPnR/wbuMMvnuDHZqZMnBly2+ItXKTiWyh+SW7JtovT3VgzMHmCvzZnk8+TJz3KHz6fUZWl/lSiOk8e7gj+8GR21jTSOWMftyRcGdfaqnp9tFwbyss2WL/XUUiR1i0JYYcEFYIxTgWjYXp/AJtNKz8=

The blueprint no longer contains the tags for the processor and the processor is empty.

• create a new blueprint from the processor. The blueprint has the tags.

so I could narrow this down to the on_player_setup_blueprint in processor.lua where does local local bp = get_bp_to_setup(player) which returns nil in case of an already existing blueprint. Adding a or e.stack here fixes this for my use cases (the test above works now) but I am not sure that this is the right fix. I noticed that for on_script_setup_blueprint you are looking at e.stack but not for on_player_setup

Thanks for report. Fixed in 2.0.14.

I still seem to be experiencing exactly the bug as described above.

Edit: This behavior happens with the MINI processors; I have not tried to use the full sized ones for anything yet

Any news on this bug that has returned ?
(Note that occurs with both processors type)

Im also still experiencing this issue. Would love to see this fixed.

Seems to only happen if the bp isnt in your inventory and is instead in the BP library?