The Champions unstoppable is stopable

Please telling me what I'm missing here. The Champion's unstoppable doesn't work.
Doesn't matter if it's a light hit, medium hit, a heavy hit or special move it does stop him and knocks him on his blue butt.
That being said, how is that unstoppable?
Doesn't matter if it's a light hit, medium hit, a heavy hit or special move it does stop him and knocks him on his blue butt.
That being said, how is that unstoppable?
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Comments
I have one dup’d and use him often and haven’t noticed this. I’ll have to check this out. He breaks through any regular or heavy attacks once unstoppable. If he isn’t something is wrong.
Can’t recall fighting a CAIW and getting intercepted while he had charges or even fighting against Champion with my CAIW.