Coming home yesterday from a 80km+ trip I found this routing directions on the last kilometers (on Leipziger Straße around 142 in Chemnitz approx 3to4 km to go to target):

It is a deviation to a very nearby parallel road for about 200 m and than back to the main road.
So I checked today, what may be the reason and I found, that the alternative I had choosen creates the deviation.

I find, that this alternative is not a real choice which makes any sense whatsoever.