Sculk Shrieker doesn't drop when mined with Silk Touch

Sculk shrieker cannot be obtained in Survival with the Silk Touch enchantment.

Steps to Reproduce:

1. Obtain a Silk Touch tool and sculk shrieker
2. Place the sculk shrieker
3. Switch to Survival mode
4. Mine the sculk shrieker with the Silk Touch tool

Observed Results:
The sculk shrieker does not drop itself.

Expected Results:
The sculk shrieker should drop itself.