an upgrade side effect or flexi-wing fallout?

With Fernando Alonso having helped breathe some excitement into the early races, as he emerged as the shock main challenger to Red Bull, the squad even came close to victory in the Monaco Grand Prix.  

But after an impressive six podium finishes out of the first eight races, including seconds in Monaco and Canada, things became a bit more difficult.  

Alonso’s best results since the Austrian GP have been fifth places, and it is McLaren,