I have submitted this as feedback using the smiley icon.
After opening the global media controls by clicking on the "play" icon at the top right of the browser window, the pause/play icon in the controls window does not change after clicking until the mouse moves.
If I click the pause icon in the global media controls window, it continues to display as pause until the pointer is moved away. Then it changes to display the play symbol. The same occurs when I click the play (or unchanged pause if I don't move the mouse). The icon does not change unless the pointer is moved.
The pause/play icon in the global media controls window should change as soon as the currently displayed icon is clicked.