Excessive grant frame usage in Windows xenbus drivers after version 9.1.3

A VM with 2 VBD, 8 vCPUs, 7 VIFs may consume over 90 grant tables, but ONLY consume 26grant tables when running with xen PV driver version 9.1.2. It will lead to virtual NIC initialization failure issue after Windows VM startup. Device manager shows NICs are notinitialized: Setupapi.log : Device...