I've seen this happen often in Manalink, but now I see it happening in Shandalar, too. The AI taps Voyaging Satyr during the opponents turn to untap a forest which has no beneficial effect (doesn't enable it to do anything and happens before combat, so it most often just results in it a potential blocker being tapped).

I think this might be a remnant of the AI for Ley Druid being tweaked to assume it's being played in a deck with Mishra's Factories.