Roaming mend on a single target

As a healing sorcerer you have the ability Roaming Mend. This ability has the following tooltip.

Roaming Mend

Activation: Instant

Force: 50

Cooldown: 15 seconds

Range: 30m

Places a mending Force on a friendly target that heals them for 3748-4329 health the next time they take damage. After healing the target, Roaming Mend travels to another friendly target within 20 meters. Roaming Mend lasts up to 30 seconds on each target and travels up to 3 times, healing up to 4 targets. Roaming Mend can only be placed on one target at a time.

My question is; what if there is no friendly target within 20m?

• Will roaming mend stay on the same target dormant until it comes within reach of someone else?
• Will it simply bounce back to the same target and heal it again (and heal it 4x)?
• Will it just end? meaning it went to one target and then poof..done..

I'm asking this from a PvP perspective, if i put roaming mend on one person and then quickly leave the area, will roaming mend be useful for that one person.