Ah I've just spotted it actually lol. When you attack with Ekans, his CD is greater than 1, but at event 67 you've said that if CD > 1 > disable all the attack logic. This actually disables the destroy bullet logic too. So it only starts calculating the distance once the CD drops.
This is also the same reason for event 62 not working. Gotta be careful when disabling your grouped logic!