I had a similar experience with the wipe on Min Wax poly on a pen recently. After several days was still soft.
As others have said, cocobolo is so oily it is hard to finish. I have made duck calls with it I put no finish on.
Yesterday at our woodturners club meeting one of our more talented turners showed a bowl he made of coco and it had a knock-out finish. He is a master at using CA with a 'cutting oil' for finishes.
I'll ask him what he did on that bowl and get back after he responds.
"Folks is funny critters."
Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire