Aspect of Control provides the damage bonus for every crowd control instance, instead of just once.

[mmolad]

Aspect of Control: You deal [25 - 35]% more damage to Immobilized, Stunned, or Frozen enemies. https://www.wowhead.com/diablo-4/aspect/aspect-of-control-1215769

For the purpose of this bug report, the aspect will be assume max rolled (35%).

1. Damage a monster and observe your damage.
2. Equip Aspect of Control.
3. Freeze the monster, damage it, and observe.
4. You deal 35% more damage to the monster.
5. Freeze the monster, stun the monster, damage it, and observe.
6. ---> You deal 82.25% more damage to the monster.
7. Freeze the monster, stun the monster, immobilize the monster, damage it, and observe.
8. ---> You deal 146.04% more damage to the monster.

Note: when equipped into an Amulet or 2H weapon, Aspect of Control does similarly inappropriate damage (258.16% bonus and 391.3% bonus, respectively).

[mmolad]

I was not able to determine if freezes, stuns, or immobilize from multiple characters or unique ability sources also provides an additional application of the aspect.