Umberto,
this is by no means a "huge" issue, but rather a simple one.
I noticed that when the cargo loaders have completed loading up the PMDG 777 LR, once they move back to their starting position they don't retract. Meaning, that the driver and his platform are still raised high and at risk of collision during the aircraft pushback.
I was of the understanding in RL op's they would retract to flat position for safety.
Rgds,
Steve