Make sure field state is valid (#11921)

packages/client/src/components/app/forms/RelationshipField.svelte

@@ -121,7 +121,12 @@
     if (!Array.isArray(values)) {
       values = [values]
     }
-    return values.map(value => (typeof value === "object" ? value._id : value))
+    values = values.map(value =>
+      typeof value === "object" ? value._id : value
+    )
+    // Make sure field state is valid
+    fieldApi.setValue(values)
+    return values
   }
 
   const getDisplayName = row => {