Too many nodeClaims

[kerthcet]

What would you like to be cleaned:

➜  Nebula git:(main) ✗ (⎈|kind-kind:N/A) kgp | wc -l
      31
➜  Nebula git:(main) ✗ (⎈|kind-kind:N/A) kg nc | wc -l
     103
➜  Nebula git:(main) ✗ (⎈|kind-kind:N/A)

When we create 30 replicas with sandboxset, we'll get more than 100 nodeclaims, which is not very good. I think the reason is just because the nodeClaim will wait for the Pod to be terminated and even the pod is gone, nc will still wait for a while until the final removal.
Why is this needed: