When you select a new unit from the list of units, the list is closed and you see your map again. The button for "list of units" is showing image of "currently selected unit". But some units are not only 32x32 but bit higher. Such units (Wall, Guard Tower, Catapult...) only the part from 32px height line _up_ is shown resulting in hardly recognizable upper fragments sticking from the bottom of otherwise empty button.
Please make it so that unit is more visible there.
Current state with catapult selected. Would you recognise it just from this upper part?
One of the possible desired states. Here I cropped the image and moved it up. Instead of showing first 32 lines of 64 line image here is shown like lines 28-60 where the defining features of given unit are.
