V3.0.9 introduced async saving of YAML files and since then we've seen reports of random issues with island loss, coop and team loss, etc. This appears to be related to this async saving and so I'm removing it for now.
1. Stop server
2. Back up world and plugin folder
3. Copy this jar over the old one
4. Restart - you should be done!
Bug fixes / changes
1. [Major] Erratic data saving causing data loss