I am having the same issue.
I am not in full screen mode, and toggling it via F11 does not help.
There should be a windows title bar with minimize, maximize, and close buttons.
See the attached screenshot.
Thanks!
I too find it incredibly frustrating that updating EN causes my taskbar icon to disappear. And I agree with Leigh Riffel and htjunkie that it seems pretty pathetic that every other app I use that is pinned seems to have figured out a way but EN can't. And whether you meant it that way or not dconnet, you did come across as a bit abrasive and condescending. Please understand, you have frustrated users here.