PPPOE Secrets Can't Reconnect

Hi, Im a newbie but I’ve managed to create a Small scale ISP for our village.

I have rb5009 + Vsol 1 PON OLT

The problem is whenever there’s a power interruption in our village for an extended time, after the power is restored my customers’ ONT can’t reconnect automatically. I have to restart the Mikrotik everytime before they can reconnect

Please help