Could be anything. Let’s dive in: VPS speed. VPS Internet Speed. Your internet speed. Your friends internet speed. A resource being a bad resource. A good resource slowly drifting to the dark side. A script that was inefficiently written and is causing issues.
Point is… you’ll have to be more specific.
Go here https://forum.cfx.re/c/technical-support
And look at this: Technical Support template
Follow that^
And make sure to fill out everything necessary