Anim notify fires during montage segment-to-segment transition before reaching actual notify - why?!

My anim montage has first section that goes from holding weapon up to aiming it at target (player) and then second section is looped shooting anim with anim notify at the beginning of it (which makes projectiles spawn when triggered). Blend times are 0.
Why would anim notify fire when animation is still in the first segment and not yet on the segment with anim notify ? (talking about NPC shooting into the air first time)

No one happened to come across such issue!?