USB function class- No events occurred after reset

Hi all, I’m developing an app based on GenericUSBFn Class driver. App uses IOCTLs as per this documentation: https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/user-mode-services-ufx . On device side I get following events: UfnEventAttach, UfnEventSuspend, UfnEventReset I’m not receiving any other event after these 3 events. Can someone help me why this could be happening? Thanks. With regards Lokesh