Hard downshift from 2-1 (Auto)

Hi folks, 03 Neon with just over 90k miles just developed another annoyance. Now, while in Drive and coming down from 3rd & 4th gear it's slipping/clunking from 2nd to 1st at 20-25 mph. This does not occur coming from 3rd to 1st or 2nd to 1st. Also, driving shifted down to 3rd stops the problem. My guess is it could be the solenoid again (replaced several years ago) or low on fluid. It looked low and I added some but the problem is still happening. Any thoughts?