Thanks for the update.
The superfluous partial artwork at the bottom is gone, but the header bars for the tag editor and the track info are still missing.
Two things I noticed and that might give you a clue:
1) If I click on the location of the missing Playing/Selected button for the track info, the panel actually switches but only on the first click. If I click a second time it doesn't work anymore.
2) If I right-click on the location of the header the popup menu appears, but it appears on the left side of the screen instead of the right side where it should.
It also does this if I click on the header of the lyrics (although that one is visible) The other popup menus (on the artwork or lyrics...) all appear on the correct location. So only that of the headers is misplaced.