I want to connect two satellite decos on the first floor via a  switch but the system falls apart. My satellite deco 1is connected to the main deco via tp link switch. Between satellite 1 and 2 there is a  switch but the system does not work. If I connect directly the two decos via ethernet then everything is well.

Main deco.....switch.....satellite 1 deco......switch......satellite 2 deco. So there is a switch between the two satellite decos. I need the switch for devices. Is it the switch or the way the decos are connected causing  the problem?