This is by design, as any drivers installed on the system which are not part of the OEM install image are discarded when the host is reset to factory defaults using the Reset System Configuration option.
After the Reset System Configuration option is run, any updated ASYNC driver on the ESXi host is lost and the ESXi host reverts to the driver version which was included in the OEM image.
extmod.tgz
file from the bootbank directory to another location prior to resetting the system configuration. Also record the drivers and versions prior to the reset. For more information, see Determining which storage or network driver is actively being used on ESXi host (1034674).