diff --git a/packages/devextreme/js/__internal/grids/grid_core/m_utils.ts b/packages/devextreme/js/__internal/grids/grid_core/m_utils.ts
index f03a205a92c4..8f612e289a62 100644
--- a/packages/devextreme/js/__internal/grids/grid_core/m_utils.ts
+++ b/packages/devextreme/js/__internal/grids/grid_core/m_utils.ts
@@ -566,8 +566,8 @@ export default {
     try {
       if (focusedElement) {
         return {
-          selectionStart: focusedElement.selectionStart,
-          selectionEnd: focusedElement.selectionEnd,
+          selectionStart: isNumeric(focusedElement.selectionStart) ? focusedElement.selectionStart : -1,
+          selectionEnd: isNumeric(focusedElement.selectionEnd) ? focusedElement.selectionEnd : -1,
         };
       }
     } catch (e) { /* empty */ }