Connectors REST endpoint doesn't show all installed connectors

Good day,

I’m calling the$ENVIRONMENT/clusters/$CLUSTER/connectors endpoint to see the list of the connectors installed on our cluster, but the list is incomplete: of 7 connectors that we have installed, only 6 are returned. I checked the configuration of the “invisible” connector but couldn’t find anything that explains this behavior. The connector is an AzureDataLakeGen2Sink, but so are most of the other 6 connectors.

What am I missing here?