I am using five Analog Discovery 2 boards in my system. All five boards are initially detected in the WaveForms software; however, after a few minutes, some of the devices drop off, and I get a tag "USB devices not recognized. When I power cycle all the devices reconnect, and after a few minutes, some devices drop off again; I get the same tag "USB devices not recognized. Can anyone help with this issue? Any effort to help resolve this issue would be appreciated. Thank you.