Resolve the issue with transferring HTML markup from the visual block Qulity

Hello. In Chrome, the markup is passed normally. From block to block. Look at the screenshot. But in Firefox, it is incorrect. Look at the screenshots.
The problem occurs after clicking on the extension button. Like grammar check extensions or other extensions. It processes the entire article and returns it back in a modified form. If you just delete and add by word, then the HTML in the right block works normally and in Firefox too. In short, there is some kind of problem. Something needs to be adjusted in the code so that Firefox also correctly passes the markup from the visual block to the HTML block. Look at the screenshots and the code in the archive. 
The problem itself, I think. Somewhere in this part of the code. Like we are trying to re-pass new data from the visual block to the HTML block after processing by the extension. Most of the code is in the archive. I will provide full access to the code to anyone who can understand the code in the archive. And understands what the issue is. Thank you for your attention!
This is the visualizer I have: quilljs.com

    // - If Quill changes, update CodeMirror

        // The problem of passing markup to the right block, the visual block quilljs uses delta instead of html

        // Works normally in Chrome. Only in Firefox it lags. Incorrectly passes HTML markup.

        quills[index].on('text-change', function(delta, oldDelta, source) {

            // console.log(delta, oldDelta, source);

            if (delta.ops.length === 1 && delta.ops[0].delete) {

                quills[index].setContents(oldDelta);

            }

            const htmlContent = quills[index].root.innerHTML;

            if (htmlEditor.getValue() !== htmlContent) {

                htmlEditor.setValue(htmlContent);

            }

        });

    });

}