So if you make a advanced firework (like multi colored or creeper shaped) your game crashes everytime you set it off

Thank you for your report!
We're actually already tracking this issue at MCPE-89115, so I will resolve and link this ticket as a duplicate.

If you would like to add a vote and any extra information to the main ticket it would be appreciated.

If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki