Many major UI elements overlap in landscape

As my bike mount broke, I used a bag which can only be mounted in horizontal/landscape position. Many major UI elements overlap and become hard to read/recognize but surpringly, most stayed usable depite being in the background:

Moreover, map center is notacibly not in map center but screen center – bad in such a situation when you move in northern direction, even worse when you let map rotate in moving direction. To me it makes the impression the ad was not taken into account during center calculation.