'n/a' injected instead of empty value

[iweawer]

Describe the bug
I enter value to kv-v2

vault kv put test/app key=app.key cert=app.crt keypass=

So I want empty value for keypass.
When I run
vault kv get test/app
I see
keypass=n/a

and when I inject it into application, the file /vault/secrets/app.properties has n/a instead of empty value:
keypass=n/a

To Reproduce

Application deployment:

Expected behavior
I expect empty value injected

Environment

• Kubernetes version:
• vault-k8s version:
  vault 1.13.1
  helm chart vault-0.24.1

Additional context