diff --git a/src/plugins/unified_search/public/filter_bar/filter_editor/range_value_input.tsx b/src/plugins/unified_search/public/filter_bar/filter_editor/range_value_input.tsx
index 2e371da5abfef..4f35d4a7f2d81 100644
--- a/src/plugins/unified_search/public/filter_bar/filter_editor/range_value_input.tsx
+++ b/src/plugins/unified_search/public/filter_bar/filter_editor/range_value_input.tsx
@@ -54,14 +54,14 @@ function RangeValueInputUI(props: Props) {
     if (typeof value !== 'string' && typeof value !== 'number') {
       throw new Error('Range params must be a string or number');
     }
-    props.onChange({ from: value, to: get(props, 'value.to') });
+    props.onChange({ from: value === '' ? undefined : value, to: get(props, 'value.to') });
   };
 
   const onToChange = (value: string | number | boolean) => {
     if (typeof value !== 'string' && typeof value !== 'number') {
       throw new Error('Range params must be a string or number');
     }
-    props.onChange({ from: get(props, 'value.from'), to: value });
+    props.onChange({ from: get(props, 'value.from'), to: value === '' ? undefined : value });
   };
 
   return (
diff --git a/src/plugins/unified_search/public/filters_builder/filter_item/operator_input.tsx b/src/plugins/unified_search/public/filters_builder/filter_item/operator_input.tsx
index 0945fbc1c4d08..45e32f86c4b90 100644
--- a/src/plugins/unified_search/public/filters_builder/filter_item/operator_input.tsx
+++ b/src/plugins/unified_search/public/filters_builder/filter_item/operator_input.tsx
@@ -59,6 +59,7 @@ export function OperatorInput<TParams = unknown>({
       singleSelection={{ asPlainText: true }}
       isClearable={false}
       data-test-subj="filterOperatorList"
+      inputPopoverProps={{ panelMinWidth: 180 }}
     />
   );
 }