Annie q bug!

Well i recently had a match vs annie and i was playing yasuo. After some fights i noticed that her q is bugged. Let me explain what happend. So she had stunn 4 abilities charged, and she q me and i windwall her q. The stunn didnt dissapear only her q cooldown. This must be fixed. The ability didnt got canceled it just got delted by yasuo's windwall why does she has stunn when she q'd someone.