ORBI RBR/RBS50 sporatic latencies between hosts on the same wifi lan FW V2.5.1.8

Two additional diagnostic steps might be:

• Look at how congested the WiFi space is, especially the 5G "backhaul" channel between the Orbi router and satellite.
  Most WiFi analyzer programs (Android, Windows) will show how many access points are on each channel and the perceived signal level.  The "backhaul" channel will hav no SSID (hidden), and is often on channel 157 in the US.
• Telnet into the Orbi router and type this command:
  satelliteinfo   wifi
  That will show the "link rate" between router and satellite.  For example my Orbi shows this:
  {
  "mac address" : "A0:04:60:0D:96:FA",
  "hop" : "1",
  "bridge mac" : "A0:04:60:0D:96:FA",
  "backhaul conntype" : "5GHz",
  "backhaul rssi" : "-67",
  "backhaul macaddress" : "A0:04:60:0D:96:FD",
  "backhaul phytxrate" : "975",
  "backhaul phyrxrate" : "1170",
  "backhaul parentmac" : "A0:04:60:1C:02:39"
  }