covert to Raw stores only default draft styles

[dotcor]

This looks like it is intentional.
Inside encodeInlineStyleRanges:

function encodeInlineStyleRanges(block) {
  var styleList = block.getCharacterList().map(function(c) {
    return c.getStyle();
  }).toList();
  var styles = Object.keys(DefaultDraftInlineStyle);
  var ranges = styles.map(function(style) {
    return getEncodedInlinesForType(block, styleList, style);
  });
  return Array.prototype.concat.apply(EMPTY_ARRAY, ranges);
}

customStyleMap styles are simply not saved.

A simple solution would be to pass the customStyleMap as a second parameter to convertToRaw(), since the customStyleMap lives only inside the react component.

[hellendag]

Nice catch, this is an oversight. Do you want to send a PR?

[hellendag]

cc @ezequiel