Bug or Glitch in Episode IV, Chapter 3 "Mos Eisley"

[gauke]

Hello
I have a problem in LEGO Star Wars - Complete Saga in the Episode IV, Chapter 3 (Mos Eisley (when playing with Han Solo and Chewbacca).

When I have to push a box to open a door, I push it down, and when it falls, it disappears, so I can't open the door and finish the stage.

How can I fix it?

Video: http://www.youtube.com/watch?v=1MQUtLL6dfM