[Mashiro]

A VPS or generally a server doesn't leak. There is no such thing. Such expressions, in the IT world, don't exist in relation to the subject of packet loss. It's a misuse of the word leak.

A server leak would be data that shouldn't be available to visitors, strangers or other unauthorized third parties gets into the public by means of security holes, misconfiguration, viruses or malicious actors such as hackers and in same cases even by authorized actors.

Like Wikileaks releases documents that people leak from agencies to make bad things happening being known in the public. Most of the leaked documents are from whistleblowers that are or have worked in the agencies and had access to documents. Others are from open holes in system where private information and data has been available to the public and someone clever discovered it (like the Panama papers if I'm not wrong).

Anyway. Packet loss is simply a sign of network issues that could be cause by a lot of factors like a bad connection (physical wires broken, switch components broken, NIC broken, etc..), overloaded or congested connection (overloaded bandwidth carriers, edge routers, all kind of attacks and such), or misconfiguration of software/hardware. Sometimes also on purpose by simply setting up a firewall that blocks connections that at your end will look like packet loss.