Auto-generated "dig" voice is a heal voice.

One of the given dig voices contains a keyword that causes the hero to sometimes interpret it as a "heal" command.

12:15 A voice from the skies thundered: “Dig right here, it's a good spot!.”
12:15 I'll admit I exaggerated the severity of those last few wounds. They were more like scratches, really.

The keyword is "good". Perhaps the phrase can be changed, e.g. Dig right here, you'll find gold!