diff --git a/CHANGELOG.md b/CHANGELOG.md
index eded3df3..4b74ff52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Fixed
+
+- Change add to cart process to synchronous to avoid loss of data in some cases
+
 ## [3.12.3] - 2022-11-23
 
 ### Added
diff --git a/react/UploadBlock.tsx b/react/UploadBlock.tsx
index 5d5843a4..c56360dd 100644
--- a/react/UploadBlock.tsx
+++ b/react/UploadBlock.tsx
@@ -235,7 +235,8 @@ const UploadBlock: FunctionComponent<
       if (chunk.length) {
         const currentItemsInCart = orderForm.orderForm.items
 
-        const mutationChunk = addToCart({
+        // eslint-disable-next-line no-await-in-loop
+        const mutationChunk = await addToCart({
           variables: {
             items: chunk.map((item: ItemType) => {
               const [existsInCurrentOrder] = currentItemsInCart.filter(