Situation: Deckdyl and I Share a chest (along with miladayday and neogamer141) with enchanted tools that are owned. However, I realised that somehow my items 'de-own' automatically and I did not /unown them. When I Did /own on them again, the next time I realised that deckdyl's tools didn't have his ownership name there. Not sure if this is a bug of not being able to have two different owners putting owned tools in a shared chest. The item is still with a unique ID, just no owner name. It happens occassionally and I don't remember when it started. Just that owner name disappears after a while.
Yes, this is likely the cause. Owner name wipes on death if I remember correctly. However the tool retains the unique ID. @STAFF-04 Server Admin this is right yeah?