Silencing Aatrox=Death?!

Unfortunately, I didn't get a picture of this happening, but here's what happened in my past match:

I was playing Aatrox in the jungle and had to go hold mid tower while my team made their way in. No biggie, I can hold it, even if there's Blitzcrank, Twitch, Brand, Tryndamere, AND Wukong. Mind you, this is in Team Builder, so people be learning their champs, so it's easier to hold than normally. Anyway, the Blitz grabs me and I've got my passive up, full bar with a Spirit Visage with my team just arriving at the tower. I'm thinking, "Alright, I'll revive, jump on Twitch and Brand, ult, and beat them down with my team, who're relatively strong, with a fed Riven, Nidalee, and Kalista on it, and a Janna to cover Kalista. We got this!"

I'm thinking this in very short amount of time... At least, I was, before getting SILENCED BY BLITZ AND KILLED, PASSIVE NOT GOING OFF! Just outright dead, despite the Passive being up WITH a full bar! That's not supposed to happen...!

= Death! Please help me out!