If you are in creative and try to drag rockets (the ones for Elytra boosting) into your inventory, the game doesn't let you do it.
To reproduce
Go into creative
Find rockets
Try to place rockets into your inventory
I am on a Huawei Mate 9
I was playing on a realm when I discovered this.
Thank you for your report!
However, this issue has been closed as Cannot Reproduce.
We were unable to reproduce the problem you are describing in the latest version.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki