"Wait x ticks then on server side" block not working

I don't know if this is the place for this post but I have a procedure that uses the wait blocks and it legit just doesn't work. I've timed it. Something triggers this procedure, which at one point is supposed to wait for 10-40 seconds (randomly), and then this procedure calls some other one that only waits 4 seconds before despawning the mob in question. I've tested it and the mob disappears after 4 seconds. Why does this happen? Here's the procedure