I see after 11 months nothing has happened with this. This happens to me all the time. I 5 wordpress sites and they all have this issue at one time or another. One fix was to wipe out my database and rebuild it. Also, wiped out all my plugins.
It is frustrating me as know ever seem to help with this. There are mo posts like this with no response.
Yes, I am very frustrated as it has happened again on a clean install with only the default installation.