Cauldron drops item upon breaking with fists

I was in a village and needed to get a leatherworker in my house so i broke the cauldron. The only problem is i used my fists to break it and sure enough it dropped and i could pick it up. This is a bug because any items made of iron or stone dont drop when mined with fists.

 

Steps to reproduce:

 

1. Place a cauldron
2. Go in survival
3. Mine the cauldron with no tools. Just your fists

 

Observed results: the cauldron will drop and you can pick it up despite the mine taking a long time

 

Expected results: because the cauldron is made of iron , not only will it take a long time to mine with fists, it will not drop the cauldron and it will be gone