Devise:
"plan or invent (a complex procedure, system, or mechanism) by careful thought."
Or
"to form in the mind by new combinations or applications of ideas or principles"
"Devising" doesn't have to include inventing something entirely unique, it can be formulating a plan by drawing on and applying existing principles to certain facts.
And no, artificial intelligence does not have its own mind, is not capable of true thought - that's the "articificial" part, but it can absolutely prepare a plan, based on a set of facts and prompts, without substantially replicating any particular pre-existing plan.
If this is truly, genuinely concerning you, just assume that "artifical" is implied "AI artificially devised a plan", but that isn't how most people speak.
If someone said "my GPS isn't working, it thinks I'm in a different country" would you have genuine concern that the speaker thought their GPS software was capable of thought?