Frank G Bowling

After fixing all 5 Lightning Towers,I return to the Scientist Location but the Platform he's in is still stuck up in the sky. What did i miss or fail to complete?The Quest shows everything in done,I only need to turn it in.

As I progress through the game,I'm noticing key presses no longer work.Also my trail markers vanish.And i lost 2 mounts so far.Wasn't even able to Respawn them.