When I set the mesh angle to 1 (very low), before creating anything. (before extruding circle to a cylinder), I seemed to have better results. (?)
Used the base surface the same triangle as the solid. (Difference in length of the projection is irrelevant.)
Maybe this is a display artifact? I see that the 3dm I posted is back to mesh angle of 10, but setting it to one looks different (better).


- Brian