When opening the publish dialog, the focus is set to <body> instead of to the edit summary field. This is bad for accessibility (keyboard access) and is generally slower for editors.
I don't know exactly since when it happens, but definitely it's not older than a week. First detected on Catalan wikipedia, but since present on all wiki's. (since may 10th train update?)
It happens with the visual editor and the text editor. Checked with Firefox 66 and Chrome 74.