Yep, I have this exact same issue. Copying something into a comment-in-progress completely breaks something, it often deletes text that comes before what you paste in, you often cannot edit what you have written anymore (backspace simply doesn't work!), if you try to copy something from the in progress comment after you have pasted something into it, you usually get something that isn't shown, same issue when trying to save a comment. Ctrl-Z will sometimes revert changes, but more often than not will destroy what you have written even though it is still visible on screen, but it'll be gone after you hit "reply"... PLEASE. PLEASE FIX THIS. It is annoying as hell, you basically CANNOT use Ctrl-V while writing a comment anymore because it COMPLETELY. BREAKS. IT.