It has been there for as long has I have been on and off today. I got on about 4 hours ago the first time. Maybe it was just a flook for a minute there.
It has been there for me today which is about 3 hours after you posted. But seems to be working fine for me.
I don't have any problems with the edit button. Hope it will return on your page as well. Good luck
I think the edit button is only there for a period of time. Just not sure for how long....