Fix bug where the UPRN/address questions were not shown after switching from a confidential to a non-confidential scheme

app/models/derived_variables/lettings_log_variables.rb

@@ -185,7 +185,6 @@ module DerivedVariables::LettingsLogVariables
       reset_address_fields!
       self.uprn_selection = nil
       self.postcode_known = nil
-      self.manual_address_entry_selected = nil
     end
 
     clear_gender_description_unless_gender_not_same_as_sex! if form.start_year_2026_or_later?

spec/models/lettings_log_derived_fields_spec.rb

@@ -1637,8 +1637,12 @@ RSpec.describe LettingsLog, type: :model do
           .and change { log.read_attribute(:county) }.from(county).to(nil)
           .and change { log.read_attribute(:postcode_full) }.from(postcode_full).to(nil)
           .and change { log.read_attribute(:uprn_selection) }.from(uprn_selection).to(nil)
-          .and change { log.read_attribute(:postcode_known) }.from(postcode_known).to(nil)
-          .and change { log.read_attribute(:manual_address_entry_selected) }.from(manual_address_entry_selected).to(nil)
+          .and(change { log.read_attribute(:postcode_known) }.from(postcode_known).to(nil))
+      end
+
+      it "does not reset `manual_address_entry_selected`;" do
+        expect { log.set_derived_fields! }
+          .not_to(change { log.read_attribute(:manual_address_entry_selected) })
       end
 
       context "when the log is a new-build first let" do
@@ -1664,8 +1668,12 @@ RSpec.describe LettingsLog, type: :model do
             .and change { log.read_attribute(:county) }.from(county).to(nil)
             .and change { log.read_attribute(:postcode_full) }.from(postcode_full).to(nil)
             .and change { log.read_attribute(:uprn_selection) }.from(uprn_selection).to(nil)
-            .and change { log.read_attribute(:postcode_known) }.from(postcode_known).to(nil)
-            .and change { log.read_attribute(:manual_address_entry_selected) }.from(manual_address_entry_selected).to(nil)
+            .and(change { log.read_attribute(:postcode_known) }.from(postcode_known).to(nil))
+        end
+
+        it "does not reset `manual_address_entry_selected`;" do
+          expect { log.set_derived_fields! }
+            .not_to(change { log.read_attribute(:manual_address_entry_selected) })
         end
       end
     end
@@ -1690,6 +1698,32 @@ RSpec.describe LettingsLog, type: :model do
           .to change(log, :manual_address_entry_selected).from(false).to(true)
       end
     end
+
+    context "when a log is changed from a confidential to a non-confidential scheme" do
+      # The confidential logic must leave manual_address_entry_selected in a
+      # routable state (default false), otherwise neither address page routes after the
+      # switch and the address question is never shown again.
+      let(:confidential_scheme) { create(:scheme, sensitive: 1) }
+      let(:non_confidential_scheme) { create(:scheme, sensitive: 0) }
+      let(:confidential_location) { create(:location, scheme: confidential_scheme) }
+      let(:non_confidential_location) { create(:location, scheme: non_confidential_scheme) }
+
+      before do
+        log.assign_attributes(manual_address_entry_selected: false)
+        log.scheme = confidential_scheme
+        log.location = confidential_location
+        log.set_derived_fields!
+
+        log.scheme = non_confidential_scheme
+        log.location = non_confidential_location
+        log.set_derived_fields!
+      end
+
+      it "asks the address question again with a routable value for `manual_address_entry_selected` (i.e., not nil)" do
+        expect(log.is_address_asked?).to be true
+        expect(log.manual_address_entry_selected).to be false
+      end
+    end
   end
 
   describe "#infer_at_most_one_relationship!" do