Hello.
This plugin is good, but what becomes of the drone if its owner disconnects from the server?

The drone will continue to hover indefinitely, even after server restarts, regardless of who is connected to the server. The drone will only stop hovering when somone lands it on a surface and then disconnects from the computer station.

I consider this to be a feature. For example, you can put a turret on the drone with the Drone Turrets plugin, then hover the drone outside your base and disconnect from the server.

Are you desiring that the drone fall to the ground when the person who previously controlled it disconnects from the server?

It may be necessary to add a configuration file in order to leave this choice to the server administrator. But also allow, instead of doing it as soon as a player has disconnected, to add a timer. This would prevent the drone from crashing after a player, for example, saw their game crash.