Same problem in 2026: trying to uprank Hilvi from rank 5 to rank 6. It wil show 4 x 5 star chhickens chickens but not one food champion at level 5. Strangely it will show other food champions if I chose another champion to rank from 5 to 6 instead of Hilvi.  Update: choosing Hilvi from the champions roster corrected this anomaly (rather than selecting her using the search bar within Tavern).