AC88U DHCP List issue. Freezing!

[follower]

Model: AC88U
Firmware: 3.0.0.4.384.20379
Issue: DHCP List issue and freezing.

If I add or change the Client Name on DHCP List menu AC88U gets freezing.
So I have to restart the router by press power button or pull out the ac adapter.
Manually Assigned IP around the DHCP list> add or change Client Name (MAC Address)>Apply>Freezing

Is this a known bug?

 

[Squall Leonhart]

do a firmware reset, sounds like you're overdue for one.

 

[follower]

do a firmware reset, sounds like you're overdue for one.

I already did NVRAM clear. But it doesn't work.