LCaliari wrote:And as you said, there is nothing to do... bug in the app??
The app doesn't do routing. The routing server does. It's all about the math and which segments say they are faster. As ncc1701v wrote, just disable the left turn at the end of the segment as there doesn't appear to be any reason to have it allowed.
On a large number of "triangular" intersections in my area, I have disabled all the "interior turns." For example: Here, here and here.