TP Link 9980 Internet light going off

[#1]

Morning,
Twice since I have had fibre turned on, approx 3 weeks ago, the internet light on my TP Link 9980 has gone out but there appeared to be no loss of service in the house, tablets, consoles etc.  Admittedly I haven't updated the firmware but has anyone else expriene this.  The explanantion in the manula is that the internet is turnd off or it is acting in bridge mode, which it isn't?
Thanks

[#2]

Hi
Mine does exactly the same without any loss of connection. Hope this puts your mind at rest.
Regards
Dave

[#3]

Thanks Dave, comes back on with a reboot, must update firmware sometime soon.

[#4]

Must admit, mine is angled so I don't actually see the lights. I only check if I don't have any connection.

[#5]

I have the latest firmware on mine (unless there's a more recent one than last December's) and it still does it.