Allow comments exceeding 5000 characters to be edited, rather than get immediately deleted

I just spent 45+ minutes writing a detailed, very long comment to reply to another user on an observation. When I hit the ‘done’ button to send it, a pop up message appeared:
image

That’s fine in itself. But when I hit ok, my entire comment got deleted!! I don’t quite understand why it wouldn’t leave my comment unpublished, and allow me to edit it, e.g. break it up into two smaller comments. I essentially wasted that entire time as I’ll have to start writing it from scratch.