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Firmware Version :

ISP :

H all,

2 weeks ago I bought a new Archer C8 v2 router
I noticed problems with router's DNS
Occasionally, it's internal DNS stops responding and all sites I try to reach could not be resolved. The active traffic however is not blocked - IPTV and HBO GO continues, but new connections cannot be initiated.

[pstoev@dell ~]$ nslookup google.com
;; connection timed out; no servers could be reached
[pstoev@dell ~]$ cat /etc/resolv.conf
# Generated by NetworkManager
search localnet
nameserver 192.168.222.1 <-- this is the router



All features are disabled - no NAT boost, no Bandwidth Control, no Dynamic DNS, no Guest Network - so these cannot be blamed.

The problem is resolved after router is not used for several hours (during the night) or when rebooting the router, but it's annoying to restart it once-twice per week.
How can I prevent this problem to occurs so often.
Any chance to get updated firmware - the only one found in tp-link site is dated 2015 and is the stock one.