Weird ODBC Gateway Failure

This is using the on premises gateway.  I do not get an error message, just don't see the gateway:

This is the code that will show the gateway:

Let
  Source = Odbc.DataSource("dsn=FIS", [HierarchicalNavigation=true]),
  WMED_PROD_Database = Source{[Name="WMED_PROD",Kind="Database"]}[Data],
  int_Schema = WMED_PROD_Database{[Name="int",Kind="Schema"]}[Data],
  employee_vw_View = int_Schema{[Name="employee_vw",Kind="View"]}[Data]
in
  employee_vw_View

But if I add a reference to a buffered list from a different datasource, with the following code, the gateway is not available, as shown above:

let
  Source = Odbc.DataSource("dsn=FIS", [HierarchicalNavigation=true]),
  WMED_PROD_Database = Source{[Name="WMED_PROD",Kind="Database"]}[Data],
  int_Schema = WMED_PROD_Database{[Name="int",Kind="Schema"]}[Data]
  employee_vw_View = int_Schema{[Name="employee_vw",Kind="View"]}[Data],
  #"Buffer Known IDs" = List.Buffer(#"Known UserIDs"),
  #"Filtered Rows" = Table.SelectRows(employee_vw_View, each List.Contains(#"Buffer Known IDs", [id_1]))
in
  #"Filtered Rows"

Some context:

• I have the #"Known UserIDs" query in the working report, I just don't reference it in the query with the pull form the ODBC datasource
• THE ODBC connection is pretty basic but does reference a PostgreSQL database hosted on AWS: ....us-west-1.rds.amazonaws.com
• The #"Known UserIDs" query directly connects to an internally hosted PostgreSQL database

I hope this helps.  Let me know if and how to get you more information if needed.  As I said, there is no error reported, just not being able to use the gateway.

Steve