I have had this problem for several months. I have a USB video capture device and an older USB camera that would just randomly freeze in OBS preview. It got very frustrating and I would have to disable and re-enable the device. This problem was worse when opening up a Chrome window or using a USB backup drive.
My solution which totally fixed the freezing issue was a BIOS change. I turned off Legacy support for USB and XHCI handoff. Both of these tell the OS to handle USB switching instead of the BIOS. When I disabled these I have had no problems.
My solution which totally fixed the freezing issue was a BIOS change. I turned off Legacy support for USB and XHCI handoff. Both of these tell the OS to handle USB switching instead of the BIOS. When I disabled these I have had no problems.