Zoom meetings/sessions don't close cleanly and release resources.

Since upgrading to ver. 6.7.5 (on Windows 10) when I close a meeting in my personal room and attempt to open a connection to a colleagues personal room the camera is not found, error msg = “in use  by other application”.  Also happens when moving from open group meetings using web browser to personal room or vv.

The workaround is to un-plug and re-plug my USB camera between every session (which I can do on a PC but not on a laptop with integral camera).  This behaviour is new, didn’t happen with previous versions.

Any suggestions please?