@David-TP 

Hi David

Thank you for your reply. Here are answers for your questions:

When you run the diagnostic, is the network topology like:

ISP modem---TL-ER605---Deco X50-5G(router mode with 4G/5G backup)--<Wi-Fi>--Linux Computer#1

                                     \----PC#2

Yes, this is exactly the topology of my test environment

 

When you constantly ping the WAN IP on ER605 for example, there are a few freezes(from 5-15 seconds to 20~60mints; ~10-30 times per day) on  Linux Computer#1, but not on PC#2.

 

Correct. There are freezes on Computer#1 but not on PC#2.

 

Have you been able to observe the non-voice conversation overlaps with the ping freezes/time-outs?

 

Yes, the problem is on any device with any type of service. When I am working from home, my company PC (dell with Windows) shows notifications that VPN connection was lost -> VPN connection has been restored. For that moment when X50-5G freezes I am not able to browse internet / speak through Teams, etc. My Samsung Galaxy S20 also shows that internet is unavailable under home's wifi and automatically switches to LTE. My Google Nest Hub also shows popup that internet connection has been lost. Generally, in that moments, every device connected to home network is unavailable to reach internet.

 

Did it make a difference to the ping diagnostic if we temporarily turned off the 4G/5G Backup?

 

Yes, it made difference. When I turned OFF 4G/5G backup and run ping on my laptop working under home's wifi for more than 12 hours there was no single freeze.

Best Regards

  @David-TP 

Hi David

Do you have any suggestions how to procedury with this issue? What could be wrong? Maybe some more detailed tests I can make?

I would be grateful for any suggestions.

Best Regsrds

  @David-TP 

One more information - freeze happens on all interfaces. WIFI as well as Ethernet. My Sister has TV connected directly to X50-5G over ethernet. Their TV shows during that freezes notifications like "ethernet cable has been disconnected" -> "ethernet cable has been connected".

  Hi all, exact same issue here!

Very upset. My teams meetings can't deal with this.

I'm more and more often switching to turn on my mobile phone hotspot.

Please let us know when this can be solved.

  @MrAndreRijo 

I had few sessions with TP-Link developers and they suggested to change my settings a bit. First, in backup settings we turned OFF double offline detection which I have set previously and we left single detection with default detection address (a.root-servers.net). Second, we have set preffered DNS in "internet connection settings" to 8.8.8.8

This helped a lot. Unfortunately not completely but I have no restart every hour or often. I still have restarts but it is something like twice per day.

  @MrAndreRijo 

Recently I have been testing modified config.

Up to now, I was setting preffered DNS to 8.8.8.8 whilest alternate DNS I left blank. Main deco took it from devide above. Recently I set it to preferred DNS to 8.8.8.8 and alternate DNS to 8.8.4.4 (both google DNS servers). After this change I don't see any restarts since at least one week. I am still using scheduled restart at 3 am every day when I am sleeping (just for refreshing the router) but now I am thinking to turn it off to see how long it will work stable.

Generally, before I bought X50-5G I had regolar X50 as my main router. That device worked stable more than month, my WAN receiver hanged after month of contineous work whilest X50 was still working. My X50-5G was working on the begining for few days without backup functionality turned ON and it was also working stable. When I turned backup functionality ON then restarts started.

Now I think I have already stable configuration where important points are: single way offline detection with  default search address (a.root-servers.net), preferred DNS set to 8.8.8.8 and alternate DNS set manually as well, to 8.8.4.4.

No, unfortunately, it doesn't help. Sometimes I have no restart for few days, today it restarted already twice during the day.

Each time the restart seems to be watchdog reset - led turns off, then after few seconds I can hear fan turned ON for few seconds (like after power supply attach), led is yellow like during startup and after 1-2 minutes led becomes green and wifi is back.