Just before I played a game on Ancient Apparation I checked my Dota Profile and AA was about 5/6 full (on the bars).

During the game I went 16-0, won and had the second highest GPM on my team. I got about 4 triple kills and 1 ultra.

After the game I checked my AA and it went down below 3/4 full.

What causes this to happen? I'm not sure if it needs to be tweaked or something but I don't really know how it can go down if you won the game and had a huge killstreak, huge GPM, etc. Maybe it wants me to ward or something? (Even though AA shouldn't really be played as a support)

Thanks in advance,