[Lordzy]

Don't overload OnPlayerConnect callback with many functions. Delay it for safe calls.

pawn Код:

new
    OPC_Timer[MAX_PLAYERS] = {-1, ...};
    
public OnPlayerConnect(playerid) {

    if(OPC_Timer[playerid] == -1)
        OPC_Timer[playerid] = SetTimerEx("SafeOnPlayerConnect", 300, false, "d", playerid);
    else {
    
        KillTimer(OPC_Timer[playerid]);
        OPC_Timer[playerid] = -1;
        OnPlayerConnect(playerid);
    }
    return 1;
}

forward SafeOnPlayerConnect(playerid);

public SafeOnPlayerConnect(playerid)
{
    OPC_Timer[playerid] = -1; //Resetting the variable.
    
    if(!IsPlayerConnected(playerid)) return 0; //If player has left before this getting called, stop going further then.
    //Rest onplayerconnect codes here.
    
    return 1;
}