Using the mindcrack pack. Loading the enderchest with any machine/pipe/tube etc does not save the changed contents. It only saves when the player interacts with the contents or pumps an item out.
So loading a chest with just an automated method and then save/exit will lose everything that changed in the chest that session. Loading chest and making one change to the chest (manually move something or pump an item out will save the contents).
Example:
Electric Jetpacks show up:
Save to title and go back into the world and the jetpacks are all gone.
Same test splitting them to regular chests or half to regular and half to ender chest has only the ones in the enderchest disappear.
Passing through a transposer will also lose the jetpack on reloading the save.
Setup:
Tinkered with this some more and it has nothing to do with the jetpacks. The ender chest does not save it's inventory when any object is loaded by a machine/tube/pipe etc. It seems to only save when the user moves an object around.
So loading a chest with just an automated method and then save/exit will lose everything that changed in the chest that session. Loading chest and making one change to the chest (manually move something or pump an item out will save the contents).
Example:
Electric Jetpacks show up:
Save to title and go back into the world and the jetpacks are all gone.
Same test splitting them to regular chests or half to regular and half to ender chest has only the ones in the enderchest disappear.
Passing through a transposer will also lose the jetpack on reloading the save.
Setup: