Drowneds are not droping the trident

Put the summary of the bug you're having here

What I expected to happen was...:
Even though the trident droping is rare, i've a considerate amount of drowned, all with the trident in hand, but none of them droped it.

What actually happened was...:
I even made a farm of drowneds so it was easyer, but still nothing

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...don't realy know, sorry
3. ...