Cannot automatically connect with PPPoE connection when the device is rebooted
I have a TP-Link Wireless N Router TL-WR940N that I connect to my ISP modem. I tried to connect to the internet with WAN Connection Type: PPPoE and WAN Connection Mode: Connect Automatically. Internet connection can be connected well. However, when I tried to reboot the TL-WR940N device, the WAN connection didn't connect automatically (always connecting...). I had to manually unplug and reconnect the LAN cable from the modem to the router so that the internet connection can be reconnected.
Previously, I used a TL-WR840N router and I had no problems with PPPoE connection.
Please help with this.