hi im from india ..i have a tplink td-w8968 v4 which i was using with an adsl connection from bsnl...now i have switched to railwire FTTH connection and configured the device to work as a wifi router.....the connection from the ONT is given to the LAN4/WAN port of the device...the configuration works and im able to use internet once i hit confirm at the end....but the pronlem is this works only for the first time....if the connection drops or the power fails and modem restarts, it is not automatically reconnecting ....i have to again go through the quicksetup click next next and confirm to reconnect the internet....the username password everything is already there as i typed before...but its just not reconnecting automatically once connection fails......i have attached a screen shot of the configuration page above......when i googled about the issue i have seen some modems having this "always on" or "automatic redial" feature in the configuration page....but i cant find that anywhere in this modem....is there any solution to keep the connection always on

this is the model

https://www.tp-link.com/in/support/download/td-w8968/v4/#Firmware

this is the user guide

https://images-eu.ssl-images-amazon.com/images/I/B1-h%2Bg62SGS.pdf

but i cant find anything that could help me