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
Linked issues
Comments 5
Probably the fact that you're loading an old version into a new, but a bug nonetheless (cannot confirm, haven't tried it)
I opened a ticket earlier with this problem and in the attached pic its shows all the mobs that dont drop items(at least for me)because of missing loot tables. I ended up fixing it because of a mob head datapack.
See MC-205130
Are you using any datapacks (maybe mob head datapacks)?