[[DOG]irinel1996]

You mean it was disappearing after some time automatically, but now doesn't work?

pawn Код:

new HideTimer[MAX_PLAYERS];

stock InfoBoxForPlayer(playerid, text[])
{
    TextDrawHideForPlayer(playerid, InfoBox[playerid]);
    new string[800];
    format(string, sizeof(string), "%s", text);
    TextDrawSetString(InfoBox[playerid], string);
    TextDrawShowForPlayer(playerid, InfoBox[playerid]); //You can't hide it with this function because you show it again here.
    KillTimer(HideTimer[playerid]);
    HideTimer[playerid] = SetTimerEx("HideNow",8000,false,"i",playerid);
}
forward HideNow(playerid);
public HideNow(playerid) { TextDrawHideForPlayer(playerid, InfoBox[playerid]); return 1; }

Maybe you had in your script an else that was hiding the TextDraw (where you are checking the positions) and you deleted it.