Not sure but when I fight a Templar they also have something that breaks cloak I'm sure it's one of their dot ability's tho it's happened twice to me now and it doesn't show on my death recap what it is
And @Jake1576 (unless is has changed) if someone near you is hit with dark flare you'll get pulled out of cloak as well.
Power of the light aswell as exclipse (+ morphs) are delayed dmg and therefor break dmg by design.
Jabs should breakt it aswell being a magica aoe.