Since I installed Deco in the house some devices keep losing internet connection while others never experience any problems. The ones that lose internet are still connected to the wifi. 
 

The problem appears randomly but always on the same devices. Often everything works perfect, but several times per day the devices experience the same problem: either no internet, or extremely slow internet (a couple

of kbit/s). 
 

At the same time other devices (even located in the same room) are working flawlessly. The problem is not related to the current use of bandwidth. 

Faulty devices

--

iPhone X13 Pro

iPad

Samsung tv (older)

Devices with no problems

--

Samsung tv (newer)

Apple tv (gen 2)

MacBook Pro

Mini mac 

iPhone 8 

iPhone X11

All devices are fully upgraded. 

I have three deco units. The first is connected to the modem, the second is connected to the first unit with an ethernet cable, the third is connected wirelessly. 
 

We have a stable internet connection, fiber, with about 150 mbit/s both up and down.