Found a bug inside blueprint viewport, when switching between front,back,right,left from perspective, if the mesh has many LOD’s, the ortographic view is selecting the lowest LOD making it impossible to position other components at a certain spot on your mesh since you can only see a few polygons because of low LOD details.
This issue is replicable on 4.17 and 4.18 on my machine.
Steps to reproduce:
1.Create a blueprint from actor/pawn/character doesnt matter.
2.Add a static mesh component.
3.Select a mesh that has LOD, the lower the LOD quality levels the worse the effect.
4.Switch from perspective view inside the BP viewport to front/back/right/left etc.
5.The engine displays the lowest LOD because of orthographic view, but in perspective works properly.
Perspective:
Ortographic side view: