invalid base64 "iv" during generate keys ranger KMS API

[Adi Kadimetla]

Group,

Apache Ranger 0.7.0 - HDP ranger-kms - 2.6.3.0-235

When I generate EEK I get invalid base64 "iv". Is this valid  to get
invalid base64 iv.

generate EEK ( EDEK )

curl  -i  '
http://host:9292/kms/v1/key/a-key-14/_eek?eek_op=generate&num_keys=1&user.name=hadoop
'

[ {
  "versionName" : "a-key-14@0",
  "iv" : "xmL5dIkuZq_c7KTYOiSt3Q",
  "encryptedKeyVersion" : {
    "name" : "a-key-14",
    "versionName" : "EEK",
    "material" : "FN8uMRqWy7ajA9tvswQPOg"
  }
} ]


Thanks