NS_ERROR_FAILURE on rte.exec

I'm currently using GrapesJS to build an editor for blog posts in my website. One of the things that I wanted to change from the default behavior was the inability to "unlink" a piece of text that had been converted to a hyperlink using the rte toolbar. So I wrote the following function:

editor.RichTextEditor.add('hyperlink',
{
    icon: '🔗',
    attributes: {title: 'Hyperlink'},
    result: rte =>
    {
        var range = rte.selection().getRangeAt(0);

        var container = range.commonAncestorContainer;
        if (container.nodeType == 3)
            container = container.parentNode;
        
        if(container.nodeName === "A")
        {
            var sel = rte.selection();
            sel.removeAllRanges();
            range = document.createRange();
            range.selectNodeContents(container);
            sel.addRange(range);
            rte.exec('unlink');
        }
        else
        {
            var url = window.prompt('Enter the URL to link to:');
            if (url)
                rte.insertHTML(`<a class="link" href="${url}">${rte.selection()}</a>`);
        }
  }
});

The function allows you to unset a link, if the cursor/selection is anywhere inside the hyperlink text.

I tested this by selecting some text that was part of a paragraph and converting it into a hyperlink as follows (the hyperlink button is the rightmost button in the RTE toolbar):

[Working Case] As you can see from the layer manager on the left, even though the selection ("GrapesJS") has been converted into a link, it will not be recognized as a new component unless I click outside of the current text block.

At this point, I am able to select the text again and press the button associated with my hyperlink command to successfully unlink the text.

[Failure Case] If, however, after link creation I click outside the block, the link is recognized as a component, and it appears as a child of the text node in the layer manager.

Now, if I try to click inside the link and press the button, it does not work, but instead throws an error "NS_ERROR_FAILURE" at exec http://unpkg.com/grapesjs:43426

The steps followed are exactly the same for both, the working and the failure cases. The only thing that changes is that in the working case, I create the link and also unlink it without clicking outside the text block (i.e., so grapesjs does not treat my link as a "new" component), while in the failure case, I create the link, click outside, and then attempt to unlink the text by clicking inside the newly recognized component.

Is this an issue with how components are handled by grapesjs? Could you help me understand why this might be happening and what I can do to address this?

Info: GrapesJS Version Used: Latest from unpkg Browser: Mozilla Firefox 64.0.4