Red marks next to virtual host items and listeners

I've logged in to the admin area and noticed red marks next to the listeners as well as virtual host.

Check the images please.

Web sites are running ok, so it must be just some issue with a status check.

After a graceful restart, it works ok.
Dashboard 2017-06-10 09-29-26.png Dashboard 2017-06-10 09-30-05.png
I've already restarted so cannot check again but there were no error messages in the log. Just the notices. As I said before all virtual hosts were functional so it must be just some status check issue.