An error occurred while saving the commentJohn McNew commented
Editor is slow on long emails. It looks like you are doing some sort of processing with every letter entered. This processing takes longer and longer as an email gets more content. With very long email threads, I often have to delete large parts of earlier replies in order to get decent performance in the editor. You need to optimize your code or change the frequency at which you process the text in the editor. It is WAY too slow.