Earlier today, I was rolling a critical wh in a Higs anchor fit Nereus, on an alt pilot (because I mistakenly thought a Hic pilot was unavailable - oh well).
As such things go, I managed to get shut on the wrong side of the wh. So ... I cloaked up and did other things.
Later I was startled by the sounds of combat. (Combat sounds always startle me, even when I initiate it)
My shields have since regenerated and I went on to run sites with mains and not alts. My cloak is still engaged. I must say I was somewhat surprised.
TLDR; don't rely on bombs to decloak someone.