Issue description:

When trying to change the font for a lot of text the font is not correctly updated.

It seems that if the selected text is too long, the font property of the current editing style is not properly reflected.

I have this code to monitor and identify the issue:

private void radRichTextEditor1_CurrentEditingStyleChanged(object sender, EventArgs e)
        {
            var style = this.radRichTextEditor1.CurrentEditingStyle;

            this.CurrentFontLabel.Text = style.SpanProperties.FontFamily.ToString();
        }

private void ArialButton_Click(object sender, EventArgs e)
        {
            ChangeFont("Arial");
        }

private void ChangeFont(string fontName)
        {
            var font = new Telerik.WinControls.RichTextEditor.UI.FontFamily(fontName);
            this.radRichTextEditor1.ChangeFontFamily(font);
        }

Working scenario:

If the selected text is not very long when setting the font to 'Arial' with the button, the font reported in the CurrentEditingStyle.SpanProperties.FontFamily of the StyleChange event is correctly identified as 'Arial'.

Broken scenario:

If the selected text is too long when setting the font to 'Arial' with the button, the font reported in the CurrentEditingStyle.SpanProperties.FontFamily of the StyleChange event is incorrectly identified as 'Verdana'.

Reproduce:

In the attached WinForms solution:

1. Set the text to a working text (that is NOT too long) with the 'Set working text' button (which also selects the inserted text).
2. Set the font to 'Arial' with the 'Arial' button.
3. Verify that the font is correctly updated in the label at the top.
4. Set the text to a text that is too long with the 'Set tool long text' button.
5. Set the font to 'Arial' with the 'Arial' button.
6. Discover that the font is incorrectly updated in the label at the top.

Identified in Telerik version 2023.1.314.40 and 2022.1.118.40.

This makes it impossible to properly update the font of all text in the editor at once, when using a dropdown for the font, since the incorrectly updated 'Verdana' font would change it back due to the Change-events.