Apple Classroom - Students Offline

Through much trial and error, my colleague and I have discovered part of the problem with this app. if there are ANY bluetooth devices turned on and near the iPads, this disrupts the bluetooth signal between them and the student devices appear offline in the teacher dashboard. This includes keyboards and speakers. The iPads will generally reconnect after the "offending" device has been turned off. If not, a quick reset or two of the bluetooth in settings helps.