The top bar in the new dungeon design does not fit in for 4:3 screen ratios (resolution used is 1024x768). Just as with the pre-fix delves, the upper right is cut off.
In this case, it is not a major problem, as it is just a bit of info, not a button. Still may deserve some attention when the next bundle of patches is done.
Game running in PC version; should be the same on every device that uses a non-widescreen display.
Also as you see, the font for the info, that an offer has been purchased, gets a little blurry in lower resolutions. It is obvious, what it means, but maybe you can still get around to have a look at this too.
Note the text right from “Dungeon” (level 2 and 66,8… respectively) and the text below the greyed out rune offer in the second screen.