After investigating the issue i found out that it wasnt duplicating the sound so its not the same issue but it might still be a bug. What happens is i have 3 jump animations and each of them in the anim sequence has a play sound animnotify at time 0. To play those jumps i created an anim montage with 3 sections, one for each jump. If i play jump 1 from the anim montage, the blend out time (0.25) makes it so that it will still trigger the anim notify of jump 2 even if the section cut doesnt include any part of it. Even if the anim notify time is bigger than 0 it will still happen. If i set blend out time to 0 it solves it, but i need the blending. Shouldnt the blend out time end at the end of the section and not execute anything from the next section?