Have my 3 units spaced around the house pretty well.  It seems like only handheld devices (Dell laptop and 2 Android Samsung tablets) drop fairly frequently.  All other IoT devices don't drop nor do all the Apple things we have. Just those 3.  Then they come back online after either restarting or restarting the Wi-Fi on the device.  The location around the house makes no difference if they drop or not.  Any ideas, please?  This didn't happen with the last mesh setup I had (Orbi 5).  Thanks