The nature of how the minions randomly target anything on their enmity list means that the resets don't always even happen as an intentional act, and rather any player who has hit the thing but is now outside of its leash radius is risk of resetting if it targets them with an AoE and goes chasing after them.

I see a lot of people who scurry off before the minions actually die because they're afraid of missing out on the SS spawn, only end up denying themselves of it entirely.