Loud grinding noise from ball

This happened mid yesterday while vacuuming stairs (if that’s relevant)- so there’s a bit of jostling the vacuum around as I go up the steps. Halfway up, ball starts making a loud grinding noise that makes me afraid to run it. Let it cool down and it sounded even worse when starting back up. It’s not the whistling noise others describe and it isn’t just upon start and stop. Wondering if there’s something I can do before reaching out for professional repair.