Hey there
we're experiencing a weird issue , the boxes place in monuments loose content and take damage , the damage fixes by itself , i cannot reproduce the loss of content between 2 boxes outside of monuments
any ideas ?

Do you have the chests set to invulnerable in the config?

The only thing I can think of about the loss of content is if for whatever reason the plugin didn't end the player's attempt at looting the physical box, and they stored their items in the real box instead. Unload the plugin and open the boxes to see if there is content in there.