Why is does it take so long to shut down an node used only as a JSON-RPC server?

[Drysprinkles291]

I'm trying to sync a full node that will only be used as a JSON-RPC server (no mining). I tried to modify the config file and added a service unit, so that the node can run in a low-end VPS with minimum RAM and CPU capabilities. The problem is that the server takes too long to stop, and it's terminated by the system, so it always start rewinding blocks that have been already downloaded.