Preserve fieldset nested fields visibility

Author: danielcardoso5

src/helpers.js

@@ -242,10 +242,25 @@ function updateField(field, requiredFields, node, formValues, logic, config) {
     field.isVisible = true;
   }
 
+  // Store current visibility of fields within a fieldset before updating its attributes
+  const nestedFieldsVisibility = field.fields?.reduce?.((acc, f) => {
+    acc[f.name] = f.isVisible;
+    return acc;
+  }, {});
+
   const updateAttributes = (fieldAttrs) => {
     Object.entries(fieldAttrs).forEach(([key, value]) => {
       field[key] = value;
 
+      // If the field is a fieldset, restore the visibility of the fields within it.
+      // If this is not in place, calling updateField for multiple conditionals touching
+      // the same fieldset will unset previously calculated visibility for the nested fields.
+      if (key === 'fields' && !isNil(nestedFieldsVisibility)) {
+        field.fields.forEach((f) => {
+          f.isVisible = nestedFieldsVisibility[f.name];
+        });
+      }
+
       if (key === 'schema' && typeof value === 'function') {
         // key "schema" refers to YupSchema that needs to be processed for validations.
         field[key] = value();