Do units heal after a combat showdown if one unit is moved away (e.g., via Flash) before combat damage is dealt?

Ruling: Yes, units heal after combat as long as a combat was started, even if combat damage is skipped or a unit is moved away before damage is dealt.

Sequence:

• Combat must be initiated (unit moves to occupied battlefield)
• Even if a unit is moved to base during the showdown (e.g., via Flash)
• After the showdown closes and after the combat damage step
• In the combat resolution step, all units heal

Nuances:

• If combat wasn't started (unit moves to unoccupied battlefield for non-combat showdown), units will not heal
• Only combat heals units
• All units in play heal all damage after combat ends, regardless of which battlefield the combat occurred on or how the damage was dealt