Hello,
 
I noticed that in the Nether of version 1.16.1 on PlayStation 4 on Bedrock version  that there was a bug with fireworks. If we send a fireworks with a duration of 3 seconds to the ground, with a crossbow or elytra, the game grashed. Indeed at the end of the explosion of the firework, the game crashes.
 
I put you the link of a video of the attached bug :
https://www.youtube.com/watch?v=gvOgXXoYvhQ