Rif.: Nighthawk Rs200 - no WIFI after Reboot - Internet via LAN ok

After I commented here before and started a discussion with the wrong title I'm starting it here again so it will dispose of the confusion... 

So after moving to a new place, I decided to get a new router as well and bought the Netgear RS300 WiFi 7.

Everything worked well for the first 3–4 weeks, and then suddenly, I started losing my connection to the internet every 20 seconds for 2–7 seconds. After that, everything would come back online for the next 20 seconds, and then the issue would repeat.

I unplugged my router for a few minutes and plugged it back in. Everything worked fine for 10–15 minutes, but then the same problem started again. I unplugged it and switched to my old Cisco router, and everything worked fine.

The next day, I swapped my Cisco router back with the new RS300, and everything worked well for a few days. However, after 2–3 days, the same issue started happening again. This time, unplugging it didn’t help. It would work fine for the first 10–15 minutes and then start losing signal every 20 seconds.

I got a replacement under warranty and received a new RS300.

And again, the same thing happened! It worked fine for the first 3–4 weeks, then started losing the signal again every 20 seconds!

I tried the following on all firmware versions (thinking it might be a software bug?):

• Firmware versions tested:

  • 1.0.1.60

  • 1.0.1.74

  • 1.0.0.38

     

• After each installation, I did a factory reset and reconfigured the router.

• The issue occurs on all connected devices, both wired and WiFi.

• I tested it with both disabled/enabled Netgear Protection Engine.

• I reconfigured DNS.

• All wired devices were connected via CAT6A cable.

My router stats:
Hardware Version RS300
Firmware Version V1.0.1.74
GUI Language Version V1.0.0.451
Protection Engine Version 2.2.214.4/1.0.0.2112

Operation Mode Router
CPU Load CPU1: 9.09% CPU2: 8.08% CPU3: 5.10% CPU4: 8.00% 
Memory Usage (Used/Total) 638MB/1999MB
Flash Usage (Used/Total) 423MB/512MB

Nothing seems to solve the problem.

Has anyone experienced the same issue or found a solution? Do you think this is a software problem or a hardware issue?

As I said in the beginning, It is the second RS300 router with the exact same problem that I have (both with very close serial number)

You can see in the attached images the lost connection as lost packages to 8.8.8.8 and the valid connection to the router itself as 192.168.1.1

My reddit post about this problem can be found in here

My previous comments about this problem in the Netgear Community can be found in here