Cows do not drop anything when killed by player in a 20w45a world when loaded into 20w46a

When I loaded into my survival world I went out to collect food, I killed one spawn of cows (about 4) and no items dropped. I killed a couple more spawns (about 20 in total) and still, not a single item.

 

Steps to Replicate:

1. Load a survival world created in 20w45a into 20w46a

2. Find a naturally spawning cow and kill it