Base structures got deleted, no player involvement

Hello, i was told to bring this issue to your attention. Had some trouble in a EU survival server with base building. Part of my structures have just vanished. It's wasn't a raid or player caused, and all barricades and furniture are still here. The remaining structures have no hp damage. A similar thing happened with barricades after an update but then it deleted all barricades, utilities and furniture, like lockers. I'm not sure if it's connected but all the structures that have remained where placed before a group was made or after group reformation, meaning only I could access them, no other group member were responsible either. If any more information is needed please ask. Also please respond that you have read this message and are aware of the issue. Thank you in advance.