[BUG] Order of identifiers affects the addition of an item into a collection

[qjhart]

For a standard collection import, items are supposed to be assigned as partOf the collection. However, this doesn't always work. The items will only be assigned properly if the first identifier is the ark: for the object. For example, in eastman, this input record.

{
  "@id": "",
...,
  "schema:identifier": [
    "B-9719",
    "ark:/13030/tf000001f7"
  ],
}

Does not get included while...

{
  "@id": "",
  "schema:identifier": [
    "ark:/13030/tf000001gr",
    "B-180"
  ],
}

does.