I have no idea what causes this glitch, but there is a workaround until we manage to find a fix. In order to make those posts come back, you must reply to them and that will make them show up as spam. You can then remove the post from the spam filter and you’re good to go.

As far as I know, this only happens when you choose to not log the edit, so I guess if you log every edit, it shouldn’t be a problem.