diff --git a/src/mongoose/sanitizeQueryValue.ts b/src/mongoose/sanitizeQueryValue.ts
index 00eedc8f30..3b48086c0d 100644
--- a/src/mongoose/sanitizeQueryValue.ts
+++ b/src/mongoose/sanitizeQueryValue.ts
@@ -38,7 +38,15 @@ export const sanitizeQueryValue = ({ field, path, operator, val, hasCustomID }:
     if (val.toLowerCase() === 'false') formattedValue = false;
   }
 
-  if (field.type === 'number' && typeof val === 'string') {
+  if (['all', 'not_in', 'in'].includes(operator) && typeof formattedValue === 'string') {
+    formattedValue = createArrayFromCommaDelineated(formattedValue);
+
+    if (field.type === 'number') {
+      formattedValue = formattedValue.map((arrayVal) => parseFloat(arrayVal));
+    }
+  }
+
+  if (field.type === 'number' && typeof formattedValue === 'string') {
     formattedValue = Number(val);
   }
 
@@ -49,9 +57,6 @@ export const sanitizeQueryValue = ({ field, path, operator, val, hasCustomID }:
     }
   }
 
-  if (['all', 'not_in', 'in'].includes(operator) && typeof formattedValue === 'string') {
-    formattedValue = createArrayFromCommaDelineated(formattedValue);
-  }
 
   if (['relationship', 'upload'].includes(field.type)) {
     if (val === 'null') {
diff --git a/test/collections-rest/int.spec.ts b/test/collections-rest/int.spec.ts
index 6d402a3f5d..37b20cfb6f 100644
--- a/test/collections-rest/int.spec.ts
+++ b/test/collections-rest/int.spec.ts
@@ -326,6 +326,22 @@ describe('collections-rest', () => {
           const { doc: updatedDoc } = await client.update({ slug: customIdNumberSlug, id: doc.id, data: { name: 'updated' } });
           expect(updatedDoc.name).toEqual('updated');
         });
+
+        it('should allow querying by in', async () => {
+          const id = 98234698237;
+          await client.create({ slug: customIdNumberSlug, data: { id, name: 'query using in operator' } });
+
+          const { result: { docs } } = await client.find({
+            slug: customIdNumberSlug,
+            query: {
+              id: {
+                in: `${id}, ${2349856723948764}`,
+              },
+            },
+          });
+
+          expect(docs).toHaveLength(1);
+        });
       });
     });