Hi Bartek, while we're still checking on the driver w/out spoof detection, please try out the steps below in order to address the issue.
1. Add “blacklist ixgbevf” to /etc/modprobe.d/blacklist.conf file.
2. Load ixgbe driver
3. Create VF using pci sysfs interface.
4. Assign VF to the VM
5. Boot VM
hope this help.
regards,
Vince