UI: When cloning a PVC, the default suggested size is 1073741824 Tib. 

4.15, 4.14, 4.13, 4.12

Always

1. Create a PVC (with 1Gi, or 10Gi, or 30Gi storage request)
2. Go to UI: Storage -> PersistentVolumeClaims
3. Clone the PVC, you'll see the default size is 1073741824 Tib, which is too big 

Cloned PVC created with 9223372036854775807 bytes request (~9223372036 Gi or ~9223372 Terabyte)

  resources:
    requests:
      storage: '9223372036854775807'

PVC created with the minimal required size for clone

W/A: specify the size manually in the UI, before hitting the Clone button

Attached the source and target PVCs yamls