STR:
1. Use a crafting bench
2. Place items in the crafting bench as if to craft something
3. Restart the server
4. Log into game
5. Observe that the items previously in the crafting bench are now deleted (they are not in your inventory or on the floor.)
ALTERNATIVE TESTS:
When you administratively kick a player from the server, their items land on the floor.
When a user times out (e.g. network disrupted) their item lands on the floor.
See @unknown's comment.
Thank you for your report!
However, this issue has been closed as a Duplicate of MC-116586.
It has been linked to this report. If you have additional information, please add it to the duplicated report.
Please search before reporting, as it's likely that one exists already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki