Reposition you’re hand gripping the cue.
Wherever you held it before, move up.
Try moving your hand up a inch at a time.
You will locate a spot where it feels right.
I found the same thing worked for me.
My Joss....18.5 ounces....favorite 1-pocket cue
My Szamboti....20.25 ounces....if I held it two inches shorter, it spun like my Joss