fix: do not pass undefined data through buildStateFromSchema for tab fields

packages/ui/src/forms/buildStateFromSchema/addFieldStatePromise.ts

@@ -517,13 +517,13 @@ export const addFieldStatePromise = async (args: AddFieldStatePromiseArgs): Prom
       state,
     })
   } else if (field.type === 'tabs') {
-    const promises = field.tabs.map((tab) =>
-      iterateFields({
+    const promises = field.tabs.map((tab) => {
+      return iterateFields({
         id,
         // passthrough parent functionality
         addErrorPathToParent: addErrorPathToParentArg,
         anyParentLocalized: tab.localized || anyParentLocalized,
-        data: tabHasName(tab) ? data?.[tab.name] : data,
+        data: tabHasName(tab) ? data?.[tab.name] || {} : data,
         fields: tab.fields,
         filter,
         forceFullValue,
@@ -538,8 +538,8 @@ export const addFieldStatePromise = async (args: AddFieldStatePromiseArgs): Prom
         skipConditionChecks,
         skipValidation,
         state,
-      }),
-    )
+      })
+    })
 
     await Promise.all(promises)
   }

packages/ui/src/forms/useField/index.tsx

@@ -65,6 +65,13 @@ export const useField = <T,>(options: Options): FieldType<T> => {
     (e, disableModifyingForm = false) => {
       const val = e && e.target ? e.target.value : e
 
+      dispatchField({
+        type: 'UPDATE',
+        disableFormData: disableFormData || (hasRows && val > 0),
+        path,
+        value: val,
+      })
+
       if (!disableModifyingForm) {
         if (typeof setModified === 'function') {
           // Only update setModified to true if the form is not already set to modified. Otherwise the following could happen:
@@ -89,13 +96,6 @@ export const useField = <T,>(options: Options): FieldType<T> => {
           }
         }
       }
-
-      dispatchField({
-        type: 'UPDATE',
-        disableFormData: disableFormData || (hasRows && val > 0),
-        path,
-        value: val,
-      })
     },
     [setModified, path, dispatchField, disableFormData, hasRows, modified],
   )