Inconsistent behaviour between Ash.get and read actions, and Ash.load in context multitenancy (pg)

%Ash.Error.Unknown{
  bread_crumbs: ["Error returned from: MyApp.Accounting.Resources.SupplierInvoice.by_id",
   "Error returned from: MyApp.Accounting.Resources.SupplierInvoiceLine.read"], 
  path: [:lines], 
  query: "#Query<>", 
  errors: [
    %Ash.Error.Unknown.UnknownError{
      error: "** (Postgrex.Error) ERROR 42P01 (undefined_table) relation \"49f7b9e2-c539-46c4-a518-8b556e6aa866.ash_supplier_invoice_lines\" does not exist",
      field: nil,
      value: nil,
      splode: Ash.Error,
      bread_crumbs: ["Error returned from: MyApp.Accounting.Resources.SupplierInvoice.by_id",
       "Error returned from: MyApp.Accounting.Resources.SupplierInvoiceLine.read"],
      vars: [],
      path: [:lines],
      stacktrace: #Splode.Stacktrace<>,
      class: :unknown
    }
  ]
}