Failed to start VM after adding multiple vGPUs in web console

CNV4.16 iib build:734430

100%

1. Create VM from VM template successfully, check the VM is running. 
   Login to web console: Virtualization -> VirtualMachines -> Create -> From templates -> Red Hat Enterprise Linux 9 VM: VirtualMachine name: rhel9-uefi, Disk source: URL(Creates PVC), Image URL: http://dell-per740-36.lab.eng.pek2.redhat.com/libvirt-CI-resources/RHEL-9.4-x86_64-latest-ovmf.qcow2, Disk size: 12 GiB, click "Quick create VirtualMachine". 

2. Add the vGPU by steps: Configuration -> Hardware devices -> GPU devices: Add 4 GPU devices: Device name: nvidia.com/GRID_T4-4Q

3. Restart the VM, the VM is keep on starting status, hit the error:
"server error. command SyncVMI failed: "LibvirtError(Code=67, Domain=20,
      Message=''unsupported configuration: Only one vgpu device can have ''ramfb'' enabled'')"'

Check the VM yaml file:
#oc get vm rhel9-uefi -o yaml > rhel9-uefi.yaml
          gpus:
          - deviceName: nvidia.com/GRID_T4-4Q
            name: gpus-aquamarine-chinchilla-19
          - deviceName: nvidia.com/GRID_T4-4Q
            name: gpus-jade-hamster-74
          - deviceName: nvidia.com/GRID_T4-4Q
            name: gpus-yellow-guanaco-60
          - deviceName: nvidia.com/GRID_T4-4Q
            name: gpus-white-stork-27

When use multiple vGPUs, the yaml file should like this:
          gpus:
           - deviceName: nvidia.com/GRID_T4-4Q
             name: gpus-aquamarine-chinchilla-19
           - deviceName: nvidia.com/GRID_T4-4Q
             name: gpus-jade-hamster-74
             virtualGPUOptions:
               display:
                 ramFB:
                   enabled: false

In step3: Faild to start the VM after adding 4 vGPU devices

In Step3: Start VM successfully.

- VM yaml file: rhel9-uefi.yaml