My issue is really simple, the server native for IS_ENTITY_VISIBLE isn’t working, when I use this one the server tell me that’s this native doesn’t exist ! Here is a screenshot of the native reference:
Yeah that makes no sense, the server can’t have an entity be visible at all, as the server has no perspective an entity can be visible in.
Might be a bad PR or automated tooling result, since there is no such native.
Apparently it just checks invisibility status, making this an invalid bug report i.e. user error. 
Okay thx for the info.
Just update FXServer, it is a server-side native you need a newer build
So this native is exists or not?
… yeah, right, it seems to just check the invisibility flag, somehow I confused it with IS_ENTITY_ON_SCREEN - Cfx.re Docs.
Not a valid bug report, seems more like user error.