From dba12d0d907f99c155d8c495de41add77f3891fd Mon Sep 17 00:00:00 2001
From: Krzysztof Babula <krzysztof.babula@ocado.com>
Date: Thu, 12 Feb 2026 10:41:10 +0100
Subject: [PATCH] fix: multi-select filter

---
 .../src/components/inputs/MRT_FilterTextField.tsx             | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/material-react-table/src/components/inputs/MRT_FilterTextField.tsx b/packages/material-react-table/src/components/inputs/MRT_FilterTextField.tsx
index d497777d6..2097c875f 100644
--- a/packages/material-react-table/src/components/inputs/MRT_FilterTextField.tsx
+++ b/packages/material-react-table/src/components/inputs/MRT_FilterTextField.tsx
@@ -168,6 +168,8 @@ export const MRT_FilterTextField = <TData extends MRT_RowData>({
             newFilterValues[rangeFilterIndex as number] = newValue ?? undefined;
             return newFilterValues;
           });
+        } else if (isMultiSelectFilter && Array.isArray(newValue) && newValue.length === 0) {
+          column.setFilterValue(undefined);
         } else {
           column.setFilterValue(newValue ?? undefined);
         }
@@ -209,7 +211,7 @@ export const MRT_FilterTextField = <TData extends MRT_RowData>({
   const handleClear = () => {
     if (isMultiSelectFilter) {
       setFilterValue([]);
-      column.setFilterValue([]);
+      column.setFilterValue(undefined);
     } else if (isRangeFilter) {
       setFilterValue('');
       column.setFilterValue((old: [string | undefined, string | undefined]) => {