Some players are using cheats, get the blocks of explosives, which then destroy all the buildings on the server, through the plugin DisableTNT you can disable the use of explosives on the MCPE servers. This will allow you to save the spawn and the buildings of other players, and of course to pull the nerves it has to be just furious that TNT is not working. Installation:
1. Download the archive with the mod;
2. Unpack the archive;
3. File DisableTNT.php place in the folder /Your_server/plugins/ and restart the server.