Items that get placed inside a bundle that is inside a chest/barrel get deleted after logging off the world and rejoining.
Linked issues
Comments 2
This issue is being tracked at MCPE-187058. Please note that you currently have your email address as your username. If that is not intentional, please change it here:
https://report.bugs.mojang.com/servicedesk/customer/user/profile
Related https://report.bugs.mojang.com/servicedesk/customer/portal/6/MCPE-220743