Galacticraft: Oddities between push/pullItems

[fatboychummy]

Running MC 1.12.2, CC:Tweaked 1.86.2, Plethora 1.2.2
Original issue from the Milo repository

After setting up a milo system I noticed that my galacticraft machines were failing to move items. Listing the items seemed to work fine, however.

After doing some singleplayer testing, I noticed the Plethora correctly detects the amount of slots if you wrap the machine, then do machine.pullItems("chest", ...), but if you wrap the chest and do chest.pushItems("galacticraft machine", ...) it detects there are less slots than actually available.

Using the example from the linked issue,

These are the slots in the circuit fabricator. Slot 1 is the energy slot, 2 to 6 are inputs, and 7 is the output.

Using the following setup:

Using chest contents
(for simplicity, items are placed in the chest in the corresponding slot they would be in the circuit fabricator):

Pulling items to their slots seems to work perfectly fine, using code:

for i = 2, 6 do
  peripheral.call(fabricator, "pullItems", chest, i, 1, i)
end

results in no errors, and all the items moving appropriately:

However, using pushItems from the chest it seems to just not be happy, using code:

for i = 2, 6 do
  peripheral.call(chest, "pushItems", fabricator, i, 1, i)
end

results in an error:

and only a few of the items being moved correctly:

[fatboychummy]

After doing some extensive testing, it seems that this may be due to the way Galacticraft handles it's item inputs. Putting two silicon in a hopper above the block seem to push items into slot 3 and 4. Using that same idea, I did two pushes to slot 3 from the chest, and that indeed also pushed items into slot 4 (which may explain why slot 5 and 6 are now slot 4 and 5).

[fatboychummy]

It causes a few problems, however, since it is not really expected behaviour