There are two bugs affecting both Pounce and Carnage.
1. Pounce is casting within melee range. This bug was present for the entire PTS and has made it to live.
2. When chasing a player, there is a dead zone for the range where neither Pounce nor Carnage will cast.
The fix: Combine Pounce and Carnage into the same cast. Pounce> hit with impact damage> apply Carnage dot.
Ref# 260609-003125