I know you say you've done this before but maybe this time the water roots just weren't strong enough. Water roots and soil roots are not equal. Epipremnum aureum is to put it bluntly a pest plant in places like Florida, if pieces fall on the ground they will root with no assistance and start growing. I know its not that way for others. My point is its not a plant you have to 'go the extra mile for' to root. You might try an experiment next time of skipping the water rooting and just stick them into soil mix. Believe it or not, it works
