Endermen don't drop enderpearls

I recently updated my world from 1.20.4 to 1.20.5 and I went to the end dimension. (I defeated the enderdragon in 1.20.4 already)

I have a looting II diamond sword and I have killed around 40 endermen now and I still have not gotten any enderpearls. (Other enchantments on the sword are: sharpness IV, sweeping edge III, fire aspect II, knockback II, unbreaking III and mending)

It is just a vanilla world, no changes to the gamerules or anything.