Pantheon's abilities are bugged when he uses Edge of Night and his W gets interrupted

I've been spamming a lot of Pantheon for the last few weeks and I've noticed anytime I have the Edge of Night active on me and my W gets interrupted, I'm no longer able use Q, E or R until my W comes off cooldown and I use it uninterrupted. For example, in my last game I actived Edge of Night, ran up to a Vayne, W'd her and she condemned it. She still got stunned, but all I could do was auto attack her from that point. No, I didn't use my other abilities before I got to Vayne, everything was off cd. I popped ghost blade and edge of night, ran up to her and W'd.

It's a pretty substantial bug. Edge of Night is incredibly useful on Pantheon and if I'm not able to use my combo in a fight it can cost us the game.