Thanks for reply. I want to clear few points here.
1. Project is not too small it has 50+ Levels, comprising off 50+ Layouts. The one i attached is sample. So this is not the case.
2. Even in that case it displays black screen for 1 or 2 seconds, that is irritating to user.
P.S I am hitting preview project.
Hope this makes it clear picture of issue. Hahaha!