"を奪{うば}われた" used incorrectly instead of "が奪{うば}われた"? (Bleach)


In Bleach Sennen Kessen-hen (S01,E04), (slight spoilers) captains have an
ability called Bankai. They thought that the enemy could seal this ability.
But as KB realizes, the enemy actually steals this ability. The actual
dialogue being "Chigau, fuuin de ha nai. Bankai wo...ubawareta!"

clip: <https://i.imgur.com/x6dazu6.mp4>

But this seems...wrong grammatically? Shouldn't it be "Bankai ga ubawareta"
(my bankai was stolen), or else "Bankai wo ubatta" (they stole my bankai)?

Or is it the case that KB is saying two seperate phrases? (i.e. "bankai
wo...", and then, after a pause, "ubawareta...").

Edit: in the following scene, someone explicitly says "bankai wo ubawareta"
(with no ambiguous pause), so maybe my understanding of japanese grammar is
wrong? Can "を" naturally be used with the passive voice like this? Or is this
some kind of special case? @.@ As an example, the sentence "the pudding was
eaten by Hanako" would always be "プリン(が/は)花子に食べられた", it would never have an
"を" particle, right? @.@

