Cisco ios_config replace: block not working

Hi,
I am using ansible 2.1.0.0
Module using: ios_config

It seems that replace: block is not working.
Whenever changing one of my ntp_server ip addresses, only this ntp server is configured on my device.
All other NTS servers are deleted in config.
For me it looks like, “replace block” is ignored.

variable:
`

ntp_server_1: 78.46.40.125
ntp_server_2: 86.59.113.113
ntp_server_3: 93.185.134.30
`

playbook:

`

  • name: enable NTP
    ios_config:
    host: “{{ inventory_hostname }}”
    username: cisco
    password: cisco
    lines:
  • ntp server {{ntp_server_1}}
  • ntp server {{ntp_server_2}}
  • ntp server {{ntp_server_3}}
    replace: block
    before: [‘no ntp’]
    match: line
    `

Best regards
Markus