Filtering ZIO on informatieobject with CMIS enabled doesnt work

[SilviaAmAm]

Describe the bug
Filtering ZaakInformatieObject on informatieobject when CMIS is enabled returns ZaakInformatieObject that are not related to the requested document.

The tests for filtering have the following pattern (both in the case of CMIS enabled and disabled):

1. Create a document
2. Create a zaak
3. Relate the document and the zaak by creating a ZaakInformatieObject
4. List the ZaakInformatieObject in the API filtering on the document created in 1.

Since there is only 1 ZaakInformatieObject, the test passes.

To Reproduce
This test should be modified as follows:

def test_filter_by_informatieobject(self):
    self.create_zaak_besluit_services()
    zaak = self.create_zaak()

    # Create two ZIOs
    eio1 = EnkelvoudigInformatieObjectFactory.create()
    eio1_url = f"http://example.com{reverse(eio1)}"
    self.adapter.get(eio1_url, json=serialise_eio(eio1, eio1_url))

    ZaakInformatieObjectFactory.create(informatieobject=eio1_url, zaak=zaak)

    eio2 = EnkelvoudigInformatieObjectFactory.create()
    eio2_url = f"http://example.com{reverse(eio2)}"
    self.adapter.get(eio2_url, json=serialise_eio(eio2, eio2_url))

    ZaakInformatieObjectFactory.create(informatieobject=eio2_url, zaak=zaak)

    zio_list_url = reverse("zaakinformatieobject-list")

    # Test that only 1 of the 2 ZIOs is returned
    response = self.client.get(
        zio_list_url, {"informatieobject": eio1_url}, HTTP_HOST="example.com",
    )

    self.assertEqual(response.status_code, 200)
    self.assertEqual(len(response.data), 1)
    self.assertEqual(response.data[0]["informatieobject"], eio1_url)

Expected behavior
When filtering the ZaakInformatieObject on the informatieobject only the objects that relate to the requested document should be returned.