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  @Solla-topee  As already mentioned, all devices are satellite except the main Deco X50. Disabling the IPV6 works most of the time or for longer periods. No red or off lights in any device . 3 192.168.68.1 show login screen but doesn't accept credentials , there is a noticeable slow down in speed.

  @Solla-topee 

1. With IPV6 enabled , i have to hard reset ( unplug replug)

2. Via wifi when everything is working the wireless speed is almost 90% of the bandwidth and wired is 100% 

3. Via wifi and when the problem occurs the speed is down at least 30% ( i have 1Gbps so it goes arround 600-700Mbps) wireless. I have not test it with cable.

One more thing observed is that i can't check for firmware updates using the app and  can't change the wan settings without rebooting the device ( hard reboot). 

  @SteveWex what outdoor access point did you use. Was it part of your deco mesh? They are still selling x50 outdoor but I'm having all sorts of issues with mine (connected to three x60).

  @samwardill 

Let's just say it's an alternative brand. I'm afraid I have given up on both Deco and TP-Link despite having spent a fortune, it seems they don't care. Even my message stating TP-Link simply stop communicating resulted in them no longer communicating. They build second-rate product and back it up with third-rate customer service.

My advice, drop the whole Deco thing like a hot potato, it'll give you nothing but trouble. There's another brand that does Mesh beginning with "A", they're very good and I'm testing it now alongside my Deco system and so far I'm finding it not only faster, but it reaches further and is easier to set up. It seems to be far more stable in every sense.

As for an Access Point for outdoors, you can usually find one at a good price on Amazon. They don't have to be the same brand as for security reasons it's sensible to use a different SSID so that anyone cracking the password doesn't gain access to your main network. Most Outdoor Access Points are used for CCTV anyway so there's usually no need to use the same SSID. On your mobile device, just use "Auto Connect" to move between indoor and outdoor SSIDs.

I use a Powerline Adapter to get the wireless signal into the house.