YAML saveConfig() removes all spaces and headers?

Hello everyone, I just have a bug I can't fix.
The thing is that I am having this:

Code:

getConfig().options().copyDefaults(true);
        getConfig().options().copyHeader(true);
        saveDefaultConfig();

in my onEnable() method, which saves all the defaults into the config. This part works.
But, here it comes. Whenever I call the method "saveConfig()", all headers and spaces get deleted.

Before:

Code:

# Hey there! Thanks for using NickNamesPlus! In the configuration file, you can change everything to your own wishes!

# Here, you can set up the ranks you are able to display while nicked!
# Change the rank prefix to the prefix you want the rank to show.
# NOTE: You have to put the ranks in order from lowest - highest, as shown below.

ranks:
  default:
    display: "&7Default"
    prefix: "&7"
    suffix: ""

# Here, you can change the "not enough permissions" message!

not-enough-permissions: "&cYou don't have enough permissions to execute this command."

# Set the GUI name
gui-name: &aSet Nickname

# Set a location for signs which is not used:
sign-location:
  x:
  y:
  z:
  world:

# --------------------------WARNING--------------------------
# DON'T TOUCH THIS! OR SYSTEM MECHANICS WILL BECOME UNSTABLE!
# --------------------------WARNING--------------------------
players:
  begin:
  

After:

Code:

# Hey there! Thanks for using NickNamesPlus! In the configuration file, you can change everything to your own wishes!
#
# Here, you can set up the ranks you are able to display while nicked!
# Change the rank prefix to the prefix you want the rank to show.
# NOTE: You have to put the ranks in order from lowest - highest, as shown below.

ranks:
  default:
    display: '&7Default'
    prefix: '&7'
    suffix: ''
not-enough-permissions: '&cYou don''t have enough permissions to execute this command.'
gui-name: Nickname
sign-location: {}
players:
  f98ed4ad-5a40-3665-84b5-6d9309ef5391:
    display:
      name: Normal
      rank: Normal
      skin: Normal
    setting-up:
      name: Not Set
      rank: Not Set
      skin: Not Set

I know, this last "don't touch" part doesn't really fit in config.yml, I am moving that to a custom .yml later.

Whenever I call this method:

Code:

public void registerPlayer(Player p){
        getConfig().set("players." + p.getUniqueId().toString() + ".display.name", "Normal");
        getConfig().set("players." + p.getUniqueId().toString() + ".display.rank", "Normal");
        getConfig().set("players." + p.getUniqueId().toString() + ".display.skin", "Normal");
       
        getConfig().set("players." + p.getUniqueId().toString() + ".setting-up.name", "Not Set");
        getConfig().set("players." + p.getUniqueId().toString() + ".setting-up.rank", "Not Set");
        getConfig().set("players." + p.getUniqueId().toString() + ".setting-up.skin", "Not Set");

        saveConfig();
    }

It removes all headers and spaces.

The strange thing is that the beginning headers stay, and the other ones don't.

Thanks a lot for your help, all help is appreciated.

 

Alright thanks for that
Is there any way to save comments?

 

Alright thats a good idea
thanks for your help