Pantheon blocking twice

When playing Camille and engaging on an Panth (Lv7 in my example), he will block the first attack after your E and then the second Q prock ~2 seconds later. Is this actually how it should work? Seems pretty dumb to me that he basically blocks the whole combo. There is also no way of procking it beforehands to have a better engage, since your W doesn't prock it at all.
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