And this is the reason that node did not start after reboot, and why you do have suspension score dropped:
The network attached storage is not so reliable as local.
You need to configure your storagenode service to depend on the network and have a delay to allow the OS to fully propagate the network before the node start:
By the way, if your model of Synology does support docker, I would recommend to run storagenode directly on Synology instead. You need only activate docker and ssh and follow the guide for CLI: CLI Install - Storj Docs
You should skip the section how to install docker, since it performed differently.
You may also migrate the current node: Migrating from Windows GUI installation to Docker CLI - Storj Docs
When you would start an existing node, you must skip the setup step too, because it should be performed only once for the entire node’s life. And you already did it when installed the Windows GUI node.