[M0HAMMAD]

Check Your Anti Cheat And Put This On it :

pawn Код:

if(!IsPlayerNPC(playerid))
{
//Code
return 1;
}

Or If You Want know Why The NPC Leave ? 1.kick or ...
Use This :

pawn Код:

new aDisconnectNames[][16] = {
    {"Time Out"},
    {"Exit - /Q"},
    {"Kick"}
};

pawn Код:

// In the OnPlayerDisconnect :
new pname[MAX_PLAYER_NAME];
GetPlayerName(playerid,pname,sizeof(pname));
printf("%s(%d) Has Been Left The Server [%d]"pname,playerid,aDisconnectNames[reason]);

if Is kick check your anti cheat. i was have this problems some day .
OR
Put "if(IsPlayerNPC(playerid)) return 1;" In The OnPlayerRequestClass, OnPlayerConnect, OnPlayerRequestSpawn And In The
OnPlayerSpawn Where You Have Added The NPC Put this

pawn Код:

if(IsPlayerNPC(playerid))
{
 //NPC Code ...
return 1;
}

I Hope I Can Help You And Sorry for my bad english
Don't Forget +Rep