finalClients was a nil slice, so an inbound that has a clients key but whose
clients are all filtered out — disabled by an admin, or cut by the traffic
job for quota or expiry — was handed to xray-core as "clients": null.
The panel already treats a stored null client list as invalid data and
coerces it to [] at startup, and null is what reporters see in bin/config.json
when they go looking for a connectivity problem, which sends the diagnosis
after a serialization bug that is not there. Build the slice empty so the
same state serializes as [].
The reported inbound also needs the clients table to be in sync, which is a
separate question still open on the issue.
Sanaei