it is possible to add a save before rebooting the server, say in 20 seconds. At the moment, there is some rollback to the nearest save

Saving is happening right before shutdown as with normal quit command call

not always, only quit command call. saving occurs after a certain time and upon loading it issues a rollback. though sometimes in this way you can copy items for example using backpacks. when used before reloading the save command, this does not happen