Items disappearimg when you upgrade your chest to bigger one

Whrn you upgrade your chest to bigger one, items in chest are removed

What I expected to happen was...:
Items in the upgraded chest

What actually happened was...:
Items disappeared

Steps to Reproduce:
1. Make a new chest
2. Open the chest and put an item in the chest
3. Upgrade the chest to bigger one
4. Open the big chest and you'll see that your item has been removed