Creaking heart is not in the natural blocks tab in the creative inventory

The creaking heart can be found in the spawn eggs creative tab category. However, despite generating naturally in pale gardens, this block doesn't appear in the natural blocks tab inside the creative inventory.

How to reproduce

1. Switch to creative, open the inventory.
2. Go to the natural blocks tab.

Expected result
The creaking heart would be located in the natural blocks category (apart from spawn eggs category).