I’m not sure am having the same issue.
My site looks ok on the landing page & one other but when you click on the blog is shows the “Maintenance Mode” message I thought was taken off 6 weeks ago.
to make things even more confusing if you hit refresh the blog is displayed like it should be.
I have deleted the maintenance mode plug-in but problem remains.
dose anyone know what is causing this problem & how to fix it?