If a unit with Mask of Foresight leaves combat (via Zhonya) and then returns to the same combat using Ride the Wind, does Mask of Foresight trigger again?

Ruling: If the same unit leaves and returns to the same combat, Mask of Foresight will NOT trigger again. If a different unit enters as the sole defender/attacker, it WILL trigger. If the same unit enters a new combat (after the first combat ends), it WILL trigger again.

Nuances:

• The ruling is currently ambiguous according to judges, with two possible interpretations of when the "first time each combat" condition is checked
• If Mask's trigger condition was never fulfilled initially (e.g., multiple defenders present), there's debate about whether moving the same unit out and back in alone could fulfill it
• A unit that was never alone when it first gained defender/attacker status won't get the trigger by becoming alone later in the same combat