Datastream: how to initiate backfill from new table?

[sasquatch]

I have a new table in my source PostgreSQL database.  I updated the PostgreSQL publication to include the new table.  Now I want to initiate a backfill for the new table in Datastream, but it does not appear in the list of objects.

If I edit the source configuration, the new table does appear under "Select objects to include", so Datastream obviously knows about it.