Pantheon Block V. Blade Waltz

When Pantheons's character passive blocks the first hit of Fiora's Ultimate, Blade Waltz, it also blocks all 4 successive hits. A level 0 passive should not nullify an entire ultimate.

Pantheon's ability tip says that it is supposed to block "the next incoming basic attack", Not the next 5 attacks, and not the next 5 non-basic attack ultimate ability strikes.