Reporting New Alpha Client bug (Screen keeps reverting to default size)

Just wanted to give a head up but I just installed then did a clean reinstall of regular client and alpha download link and still having this same issue, issue being whenever I change a window from selecting a game to play or browsing store (it does not really matter which) one my screen size always resets to default size and I have to manually go into setting and reset to largest option. No biggie just trying to give a heads up.