I could use some help from other Premium/LE owners. I think I've come up with a set of steps to reproduce the warp ramp out of sync issue. This is when the ramp does not stop flush with the playfield in the down position causing balls to get stuck there until ball search. Please give these steps a try and see if it happens for you too.
Reproduction steps:
0. Allow two modes to be stacked
1. Start Game as Luke and Light Tatooine Missions
2. Light Endor Missions
3. Start Speeder Bike Chase and Escape from Mos Eisley
4. Shoot the ramp once to bring up the warp ramp
5. Shoot Hoth so ramp has to come down to let release ball
6. Keep the timers going by hitting a drop or spot target
7. When EfME times out the ramp will come down and past the bottom position