diff --git a/src/DragGrid.vue b/src/DragGrid.vue
index 5d6e73b47927e0e076eb2604d86ced51cd922746..49bba443ca14a52e17969e06ffe7792a7d37c47e 100644
--- a/src/DragGrid.vue
+++ b/src/DragGrid.vue
@@ -311,6 +311,13 @@ export default {
     items() {
       if (!this.multipleItemsY) return this.value;
 
+      if (this.value.some((item) => item.w > 1)) {
+        console.warn(
+          "You are using multipleItemsY but some items have a width greater than 1.",
+          "This is not supported and will lead to unexpected behaviour."
+        );
+      }
+
       // calculate numSiblings for each field
       // First dimension: the columns
       let xSiblings = [];