Where's BusRelations call?

Hi,
according to documentation, as a filter driver I’m supposed to see a
BusRelations (or possibly a IRP_MN_QUERY_PNP_DEVICE_STATE) call first during
a surprise removal. I’m seeing neither. I do get a RemovalRelations and
EjectionRelation, then SurpriseRemoval and final Removal.

Where’s the BusRelations call?

thanks
andy