Description of problem:
Can't create a snapshot for VM with containerDisk and mounted PVC disk

> $ oc get vmsnapshot --watch
> NAME SOURCEKIND SOURCENAME PHASE READYTOUSE CREATIONTIME ERROR
> snapshot-uninterested-cheetah VirtualMachine vm-fedora-with-pvc InProgress false
> snapshot-uninterested-cheetah VirtualMachine vm-fedora-with-pvc Failed false

> $ oc get vmsnapshot snapshot-uninterested-cheetah -o json | jq .status.conditions
>[
>.
>

{ > "lastProbeTime": null, > "lastTransitionTime": "2023-07-17T17:32:10Z", > "reason": "snapshot deadline exceeded", > "status": "True", > "type": "Failure" > }

>]

With unmounted second disk the snapshot succesfully completed:

> $ oc get vmsnapshot
> NAME SOURCEKIND SOURCENAME PHASE READYTOUSE CREATIONTIME ERROR
> snapshot-recent-flyingfish VirtualMachine vm-fedora-with-pvc Succeeded true 8s

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. create VM with containerDisk (root) and PVC (second)
2. go to the VM console
3. create ext4 filesystem on the second disk -
mkfs.ext4 /dev/vdb

4. mount second disk -
mkdir /mnt/test
mount /dev/vdb /mnt/test

5. create new file inside that folder with some text - e.g. vi /mnt/test/TEST_FILE
6. try to make a snapshot

Actual results:
failed to create snapshot

Expected results:
snapshot created succesfully

Additional info: