[Observium] Missing customers

I've labeled a number of our ports as "Cust: somebody", but not all appear on the Port --> Customers page.

All the "Cust" labeled ports are on a pair of Junipers and most of them work, but a few are skipped (4 out of 11 are skipped).

With debug enabled on the poller, I can see the 'ifalias' containing the Cust string:

ifAlias.519 = Cust: WHRC

I can also see various other OID's for interface ID 519:

ifDescr.519 = ge-1/0/3

ifType.519 = ethernetCsmacd

ifOperStatus.519 = up

ifName.519 = ge-1/0/3

etc..

Running version 18.10.9472 (stable)

thanks for your time.