a bug?im not sure

[XiuerTalent]

    public static void RueIHint(this Player player, float time, float pos, string message)
    {
        if (player is null || !player.IsConnected)
            return;
        RueDisplay display = RueDisplay.Get(player);
        Tag tag = new Tag(Guid.NewGuid().ToString());
        display.Update();
        display.Show(tag, new BasicElement(pos, message), time);
        Timing.CallDelayed(time, () =>
        {
            display.Remove(tag);
        });
    }

this is my packaging method,but i found that the hint will flicker after many rounds，i havenot found whats the reason
or，is there any method to create a permanent ui hint?

[XiuerTalent]

ui method:
while(player.IsConnected)
{
yield return Timing.WaitForSeconds(1);
player.RueIHint(1f, 0,mytext);
}