I had a problem with this, on this trick… for a while.
Make sure you keep your string taut. If there’s any slack in the string when you do some of the maneuvers, the yoyo will eat up the slack like there’s no tomorrow.
So yeah. Keep your string nice and taut/tight. Try doing it a little faster, but also try pulling your hands apart as you do the motion. Pulling your hands apart will ensure the strings are taut while also helping the yoyo naturally do the motion.
Hope this helps. I suck with words
Also, make sure your bearing is clean.