Does damage remain on units after Snapvine's effect resolves, or does it heal?

Ruling: Damage remains on units after Snapvine's effect resolves. Units only heal at end of turn and end of combat (when multiple players are at 1 location). Snapvine's effect is not combat.

Nuances:

• If Snapvine takes damage from its own effect and then moves to a battlefield controlled by another player, that damage mark remains until actual combat occurs or end of turn