Am using:

Version information

Version: 46.0.2597.57 - Opera is up to date
Update stream: Stable
System: Mac OS X 10.12.5 64-bit

I get the 'Speed Dial' sites when I open Opera, but when I navigate off the speed dial screen the grey box with white letters that say "Speed Dial" stays visible on the other pages. Not sure if this is something I can affect, and normally it is not a problem, but today I went to a page that had a menu of items in the upper left hand portion of the page, and the Speed Dial box obscured it. Any thoughts on what might be causing it to stay visible and not go away? I submitted a screen capture to support, but don't see a method of posting it here....