The bug
Parrots don't imitate the new mobs in 1.14 (pillager, ravager and panda). The pillagers and the ravagers are aggressive and the pandas are neutral (except worried panda).
MC-138078
Parrots don't imitate pillagers, ravagers and pandas
Resolved
Fixed
0
Not ALL Pandas are neutral; only the aggressive ones attack upon being hit. Thus, Pandas not being imitated might be WAI, as parrots also do not mimic passive mobs (i.e. Sheep, Cows, Pigs, etc.)