I experience a slightly different yet similar situation with hopperminecarts. I use hopperminecarts as vacuumcleaners beneath a mobtrap, but when I go a good distance away from my base (probably beyond my base being loaded) and return, my hoppercarts are gone. The mobtrap is one based on killing mobs by falldamage so mobs on the loose or some other interaction with anything other than me isn't the case.
Further game information: hard difficulty Gameversion 1.5.1 Clean, non-modded jar.
I experience a slightly different yet similar situation with hopperminecarts. I use hopperminecarts as vacuumcleaners beneath a mobtrap, but when I go a good distance away from my base (probably beyond my base being loaded) and return, my hoppercarts are gone. The mobtrap is one based on killing mobs by falldamage so mobs on the loose or some other interaction with anything other than me isn't the case.
Further game information:
hard difficulty
Gameversion 1.5.1
Clean, non-modded jar.