Recently Lumo has started interrupting itself mid-answer saying "Wait..." then correcting, sometimes totally negating, the part of the answer it already gave you, which you may have spent time reading and digesting which then becomes a total waste of your time.

Have Lumo not start writing until it has its total best answer. It's plenty fast enough and now that you're displaying its "thinking" process we're not worried that it's stalled.
Or if you prefer, make this a checkbox we can choose, or a retained setting if we're signed in.