Shulker Boxes no longer drop when breaked in creative mode

Put the summary of the bug you're having here

What I expected to happen was...:
That the shulke box would drop, with its contents still inside it

What actually happened was...:
It didn't drop, itself or its contents

Steps to Reproduce:
1. Place a dark gray shulker box and put stuff in it.
2. Break it in creative mode
3. Realize that it doesn't drop and that you hafta place and fill another