If use the following code to return the most recent version of a page and make some edits my custome properties. The issue is that epiWhitePage.MyText = "My New Text" never gets saved. I was able to save it once before there was an unpublished version. Now I can't make updates to the unpublished version.

var repository = EPiServer.ServiceLocation.ServiceLocator.Current.GetInstance<IContentRepository>();

ContentVersion draftPage = draftRepository.LoadCommonDraft(contentLink: MyPageContentLink, language: Language.Name);

MyPage epiWhitePage = (MyPage)repository.Get<MyPage>(contentLink: draftPage.ContentLink,
                                                                                   selector: LanguageSelector.AutoDetect(true)).CreateWritableClone();

bool isDraft = (draftPage.IsCommonDraft && draftPage.Status == VersionStatus.CheckedIn);

epiWhitePage.MyText = "My New Text"

if (isDraft)
{
    repository.Save(content: epiWhitePage, action: SaveAction.ForceCurrentVersion, access: EPiServer.Security.AccessLevel.NoAccess);
}
else
{
  repository.Save(content: epiWhitePage, action: SaveAction.CheckIn, access: EPiServer.Security.AccessLevel.NoAccess);
}