[ovirt-users] USB problem after update

Hi list, I just upgraded from Ovirt 3.6.3 to 3.6.6. I have two nodes. One of it is also running the engine. After the upgrade I noticed that my VMs on the master/engine host are not able to connect to the USB devices any more. The "Add Host Devices" dialog is empty and does not show any HW! On the Hosts Tab I can see "Host Devices". Please let me know how to fix this issue. Best regards and thank you Christoph