Expected Behavior

See video:
https://www.youtube.com/watch?v=j38Zq2efmi8
The minecart clipped in this setup stays clipped into the cauldron and solid block when the top piston is moved

Actual Behavior

See video:
https://www.youtube.com/watch?v=IRpEAyyxW3A
The minecart does not properly clip into the solid block and instead falls through it.

Reproduction Steps

1. Perform clip shown in video
2. Power the top piston which would move the cauldron
3. Minecart isnt clipped into solid block with lithium, which is inconsistent with vanilla

This is probably caused by the custom voxel shape implementation for voxelshapes that are 1/8th aligned not returning the point positions when combineAndSimplify is called.

Fixed in Lithium 0.5.6.