Spell check does not refresh correctly when there are annotation markers around the current word.

KeyNotFoundException is thrown when loading a document with a custom bibliographic style applied.

As a workaround, you can change the current bibliographic style to one of the predefined styles before the export of the document.

...
this.radRichTextBox.CommandExecuting += RadRichTextBox_CommandExecuting;
...

...
private void RadRichTextBox_CommandExecuting(object sender, CommandExecutingEventArgs e)
{
    if (e.Command is SaveCommand)
    {
        this.radRichTextBox.ChangeBibliographicStyle(new APAFifthEditionStyle());
    }
}

Korean language input does not work correctly on Windows 11 versions after 22H2 (OS Build 22621.1265).

This is related to an update to the Microsoft Input Method Editor (IME). The workaround is to enable the "Previous version of Microsoft IME" (check the attached screenshots for the steps).