Archer D50 v1 latest firmware available

Firmware Version:0.8.0 1.3 v0046.0 Build 170223 Rel.61663n Hardware Version:Archer D50 v1 00000000

Sometimes my Modem not responding at all, it is pingable but I can't access it from neither Web nor Telnet and from tether APP, but internet still working until I made restart for the modem.

History of the issue: The modem keep still working fine until I go to system logs several time the page will hang at all, so it will be not respoding and the telnet still work, so I unchecked the option to save the logs locally.

Then when I apply parental control to all my devices in my home and all the time, when I add more than 6 keywords the modem will not respond at all, only it is pingable and internet is fine. Even after restart it will respond a little for 2 minutes then the same issue, So I made hard reset for the modem and now it is ok but parental control disabled and I am afraid to enable it again.

Anyone faced this issue in the same or different router and what could be the solution.   Please help!!!!!!!!!