I'm having the same problem. last Thursday I placed fully repaired Ant Armor, Spider Armor, and underwater gear on mannequins and a newly crafted dagger in a chest. When I went back to get them, they were all at half heath -- every item. Today I stored most of my weapons and armor in an acorn chest because I was going diving in the pond and I wouldn't need them. When I retrieved them later every item was at half health. This needs to be fixed.

-Hello

I'm sorry that you've both been dealing with this durability issue during your time with Grounded. The team is aware of this issue, and they are still investigating the cause of it. 

If you haven't already, I recommend that you fill out a support request at https://support.obsidian.net/contact and include the following information: 

1. Platform (Xbox Console, PC Game Pass, PC Steam).
2. Multiplayer or Single Player Game (if multiplayer, can you tell us how many players in total in the game, and their platforms if known)
3. Description of issue.
4. Last thing you did in the game before the issue occurred, if applicable.

The more information you can include, such as clips or saves, would be very helpful!

Thanks!