I think that there is currently a bug where upon dying most of the items drop but some just disappear for no reason.
MC-174618
items disappearing upon death
Resolved
Duplicate
0
Thank you for your report!
We're actually already tracking this issue in MC-144768, so I've resolved and linked 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 – 📖 Game Wiki