(I can't post any links, and I can't upload the images for they are too big)
The first image is a direct screenshot and shows how the game screen should look. The second image I adjusted in paint to show approximately what I'm actually seeing. While making screenshots I discovered another bug: the hotbar sometimes does not load on startup. Note that in the first two images there is no hotbar. The third image is the same scene but with the hotbar.
I saw the hotbar available when I loaded my game directly from the menu, but it was gone when I started a new game first and then loaded my game. It was also gone earlier when I had played from the beginning and made no reloads, but now when I start a new game it is showing even though it disappears as soon as I load a game.
You could try messing around with either your screen settings or the game launcher. I recommend tinkering with the screen settings, preferably through the graphic drivers manager of your choice (like Catalyst).
About the hotbar - I did have this issue as well, but it was too random for me to reliably reproduce it. Sorry :(