The function of recycler is working:
But I found it use an upstream image of recycler

$ oc describe pv nfs
Name:            nfs
Labels:          <none>
Annotations:     pv.kubernetes.io/bound-by-controller: yes
Finalizers:      [kubernetes.io/pv-protection]
StorageClass:    
Status:          Bound
Claim:           nfs/nfsc
Reclaim Policy:  Recycle
Access Modes:    RWX
VolumeMode:      Filesystem
Capacity:        1Gi
Node Affinity:   <none>
Message:         
Source:
    Type:      NFS (an NFS mount that lasts the lifetime of a pod)
    Server:    172.30.122.248
    Path:      /
    ReadOnly:  false
Events:
  Type    Reason          Age   From                         Message
  ----    ------          ----  ----                         -------
  Normal  RecyclerPod     55s   persistentvolume-controller  Recycler pod: Successfully assigned default/recycler-for-nfs to compute-0
  Normal  RecyclerPod     47s   persistentvolume-controller  Recycler pod: Pulling image "busybox:1.27"
  Normal  RecyclerPod     41s   persistentvolume-controller  Recycler pod: Successfully pulled image "busybox:1.27"
  Normal  RecyclerPod     41s   persistentvolume-controller  Recycler pod: Created container pv-recycler
  Normal  RecyclerPod     41s   persistentvolume-controller  Recycler pod: Started container pv-recycler
  Normal  VolumeRecycled  41s   persistentvolume-controller  Volume recycled

Should I open a new bug or it will be tacked on this one? Or we should say it is fixed?

Please open a new bug -- the wrong recycler image needs to be fixed in a different place (if at all). This bug is about something else.

Thanks, Tomas! Verified based on comment#5

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2019:0758