We'll have to wait to see if anything can be done, reset, reindexed or otherwise fixed.

Keep in mind, everything that happens here on DhO is done by volunteers. We generally have full-time jobs, too, so things may take some time to get to. And let's be honest, this is an Internet-based messaging system. I've worked with many of these things over the years, some very, very well staffed and funded, and they're still inherently a bit wonky in my experience.

Please be patient and in the meantime, a best-practice to use would be to save your posts before you hit the submit button. You can save them in the clipboard or to the text editor of your choice. That way you don't end up having to re-type them if they get munged, eaten or lost.

And... we will keep working on the issues you're having.

The same thing happened to me twice, when I made posts for the sole purpose of checking if I could make posts (there had been difficulties). 

And Chris, no worries, I do not expect anyone to drop everything else just to attend to this. Just trying to contribute with information about the specifics of the problem. Bugs are expected on forums, after all, and I understand very well that the work done here is voluntary. I think it is handled with excellence. No complaints. 

It seems like we now know why it happens to some threads and not others: it happens when somebody deletes a post.