bug: [#4579] Ensure triggerFromStep uses the correct current_step

previously the current step was inferred by looking at the last completed step and considering the step after that the current step. This does not work however if you complete a step and go back to the previous step, so instead we explicitly pass the current form step via the serializer context

src/openforms/submissions/api/serializers.py

@@ -200,7 +200,11 @@ def create(self, validated_data):
         return super().create(validated_data)
 
     def to_representation(self, instance):
-        check_submission_logic(instance, unsaved_data=self.context.get("unsaved_data"))
+        check_submission_logic(
+            instance,
+            unsaved_data=self.context.get("unsaved_data"),
+            current_step=self.context.get("current_step"),
+        )
         return super().to_representation(instance)
 
 

src/openforms/submissions/api/viewsets.py

@@ -635,6 +635,10 @@ def logic_check(self, request, *args, **kwargs):
 
         submission_state_logic_serializer = SubmissionStateLogicSerializer(
             instance=SubmissionStateLogic(submission=submission, step=submission_step),
-            context={"request": request, "unsaved_data": data},
+            context={
+                "request": request,
+                "unsaved_data": data,
+                "current_step": submission_step,
+            },
         )
         return Response(submission_state_logic_serializer.data)

src/openforms/submissions/form_logic.py

@@ -188,7 +188,9 @@ def evaluate_form_logic(
 
 
 def check_submission_logic(
-    submission: "Submission", unsaved_data: dict | None = None
+    submission: "Submission",
+    unsaved_data: dict | None = None,
+    current_step: "SubmissionStep | None" = None,
 ) -> None:
     if getattr(submission, "_form_logic_evaluated", False):
         return
@@ -198,7 +200,7 @@ def check_submission_logic(
     if not submission_state.form_steps:
         return
 
-    rules = get_rules_to_evaluate(submission)
+    rules = get_rules_to_evaluate(submission, current_step)
 
     # load the data state and all variables
     submission_variables_state = submission.load_submission_value_variables_state()