Thanks for thinking about it a bit- but, no, I rarely refresh a page. However, if you preview a post, or the window changes going from reply with quote to the reply to thread window, text will vanish when the window changes.
And it doesn’t do it all the time. Here, I’m replying with quote and it worked this time. Now, it may work for a while or it may not, but (this is strange) certain posts, it won’t reply to at all. And the size of the post has no bearing on it. Well, I mean you can reply, but the post will be blank, and you’ll have to start all over.
I don’t get fancy with extensions or whatever.