For the past while I've been using Jitsi for Windows as my daily use XMPP client. However, in that time I've noted that it causes some problems.
I don't use it for anything involving audio. Just text chat via a private XMPP server.
On that basis I've got the audio system setting set to "None." Similarly, the camera selection is set to "no device."
Even so, I find that Jitsi reacts every time a USB media device is added/removed. I do this a lot. Sometimes it seems that all the activity causes Windows to lose control of the USB subsystem. The entire system becomes unresponsive.
This highlight the logic of a PS-2 type keyboard+mouse. When Windows loses it's USB control all I/O goes away for a while.
I would have thought that with the audio & video devices effectively disabled Jitsi would ignore the comings & goings of USB devices.