The issue is that both the notated music and the rhythmic cue have the same voice direction. You’ll need to change the voice direction of the main voice to have down-pointing stems. It also looks as if you’re forcing more music onto the system than Dorico can comfortably fit with your current note spacing settings, so you should consider making some adjustments to your settings somewhere (either relax your fixed casting off, or reduce the ideal note spacing gaps, or reduce the staff size a little).