diff --git a/public/app/features/alerting/unified/triage/rows/FolderGroupRow.tsx b/public/app/features/alerting/unified/triage/rows/FolderGroupRow.tsx
index 4809a44573a..1e5e1156452 100644
--- a/public/app/features/alerting/unified/triage/rows/FolderGroupRow.tsx
+++ b/public/app/features/alerting/unified/triage/rows/FolderGroupRow.tsx
@@ -1,4 +1,5 @@
 import { css } from '@emotion/css';
+import { isString } from 'lodash';
 import React from 'react';
 
 import { GrafanaTheme2 } from '@grafana/data';
@@ -27,7 +28,7 @@ export const FolderGroupRow = ({ row, leftColumnWidth, rowKey, depth = 0, childr
       title={
         <Stack direction="row" gap={0.5} alignItems="center">
           <MetaText icon="folder" />
-          <Text color="primary">{row.metadata.value}</Text>
+          {isString(row.metadata.value) && <Text color="primary">{row.metadata.value}</Text>}
         </Stack>
       }
       isOpenByDefault={true}
diff --git a/public/app/features/alerting/unified/triage/rows/GroupRow.tsx b/public/app/features/alerting/unified/triage/rows/GroupRow.tsx
index 4499672dd6e..1bb73674165 100644
--- a/public/app/features/alerting/unified/triage/rows/GroupRow.tsx
+++ b/public/app/features/alerting/unified/triage/rows/GroupRow.tsx
@@ -5,9 +5,10 @@ import { AlertLabel } from '@grafana/alerting/unstable';
 import { GrafanaTheme2 } from '@grafana/data';
 import { useStyles2 } from '@grafana/ui';
 
-import { GenericGroupedRow } from '../types';
+import { EmptyLabelValue, GenericGroupedRow } from '../types';
 
 import { GenericRow } from './GenericRow';
+import { formatLabelValue } from './utils';
 
 interface GroupRowProps {
   row: GenericGroupedRow;
@@ -19,13 +20,21 @@ interface GroupRowProps {
 
 export const GroupRow = ({ row, leftColumnWidth, rowKey, depth = 0, children }: GroupRowProps) => {
   const styles = useStyles2(getStyles);
+  const isEmptyValue = row.metadata.value === EmptyLabelValue;
 
   return (
     <GenericRow
       key={rowKey}
       width={leftColumnWidth}
-      title={<AlertLabel size="sm" labelKey={row.metadata.label} value={row.metadata.value} colorBy="key" />}
-      isOpenByDefault={true}
+      title={
+        <AlertLabel
+          size="sm"
+          labelKey={row.metadata.label}
+          value={formatLabelValue(row.metadata.value)}
+          colorBy="key"
+        />
+      }
+      isOpenByDefault={!isEmptyValue}
       leftColumnClassName={styles.groupRow}
       rightColumnClassName={styles.groupRow}
       depth={depth}
diff --git a/public/app/features/alerting/unified/triage/rows/utils.ts b/public/app/features/alerting/unified/triage/rows/utils.ts
index 6a4d0731643..d5b193ee755 100644
--- a/public/app/features/alerting/unified/triage/rows/utils.ts
+++ b/public/app/features/alerting/unified/triage/rows/utils.ts
@@ -1,4 +1,4 @@
-import { WorkbenchRow } from '../types';
+import { EmptyLabelValue, LabelValue, WorkbenchRow } from '../types';
 
 // Generate unique keys for WorkbenchRow items
 export function generateRowKey(row: WorkbenchRow, fallbackIndex: number): string {
@@ -8,6 +8,8 @@ export function generateRowKey(row: WorkbenchRow, fallbackIndex: number): string
   } else {
     // For GenericGroupedRow, create key from label and value
     const groupedRow = row;
-    return `group-${groupedRow.metadata.label}-${groupedRow.metadata.value}`;
+    return `group-${groupedRow.metadata.label}-${formatLabelValue(groupedRow.metadata.value)}`;
   }
 }
+
+export const formatLabelValue = (value: LabelValue): string => (value === EmptyLabelValue ? '<no value>' : value);
diff --git a/public/app/features/alerting/unified/triage/scene/Workbench.tsx b/public/app/features/alerting/unified/triage/scene/Workbench.tsx
index 356a2924461..f202a5cd0a0 100644
--- a/public/app/features/alerting/unified/triage/scene/Workbench.tsx
+++ b/public/app/features/alerting/unified/triage/scene/Workbench.tsx
@@ -1,3 +1,4 @@
+import { isEmpty } from 'lodash';
 import { ArrayValues } from 'type-fest';
 
 import { DataFrame, PanelData } from '@grafana/data';
@@ -6,7 +7,7 @@ import { useQueryRunner, useTimeRange, useVariableValues } from '@grafana/scenes
 
 import { Workbench } from '../Workbench';
 import { DEFAULT_FIELDS, METRIC_NAME, VARIABLES } from '../constants';
-import { AlertRuleRow, GenericGroupedRow, WorkbenchRow } from '../types';
+import { AlertRuleRow, EmptyLabelValue, GenericGroupedRow, WorkbenchRow } from '../types';
 
 import { convertTimeRangeToDomain, getDataQuery, useQueryFilter } from './utils';
 
@@ -79,29 +80,40 @@ function groupData(dataPoints: DataPoint[], groupBy: string[], depth: number): W
   }
 
   const groupByKey = groupBy[depth];
-  const grouped = new Map<string, DataPoint[]>();
+  const grouped = new Map<string | typeof EmptyLabelValue, DataPoint[]>();
 
   for (const dp of dataPoints) {
-    const key = String(dp[groupByKey] ?? 'undefined');
-    if (!grouped.has(key)) {
-      grouped.set(key, []);
+    const mapKey = dp[groupByKey] ?? EmptyLabelValue;
+    if (!grouped.has(mapKey)) {
+      grouped.set(mapKey, []);
     }
-    grouped.get(key)?.push(dp);
+    grouped.get(mapKey)?.push(dp);
   }
 
   const result: GenericGroupedRow[] = [];
+  const emptyGroups: GenericGroupedRow[] = [];
+
   for (const [value, rows] of grouped.entries()) {
-    result.push({
+    const labelValue = isEmpty(value) ? EmptyLabelValue : value;
+
+    const group: GenericGroupedRow = {
       type: 'group',
       metadata: {
         label: groupByKey,
-        value: value,
+        value: labelValue,
       },
       rows: groupData(rows, groupBy, depth + 1),
-    });
+    };
+
+    // Separate empty label groups to append at the end
+    if (group.metadata.value === EmptyLabelValue) {
+      emptyGroups.push(group);
+    } else {
+      result.push(group);
+    }
   }
 
-  return result;
+  return [...result, ...emptyGroups];
 }
 
 // @TODO narrower types for PanelData! (if possible)
diff --git a/public/app/features/alerting/unified/triage/scene/utils.ts b/public/app/features/alerting/unified/triage/scene/utils.ts
index 19886a760e0..456e3f3c7bf 100644
--- a/public/app/features/alerting/unified/triage/scene/utils.ts
+++ b/public/app/features/alerting/unified/triage/scene/utils.ts
@@ -1,6 +1,6 @@
 import { TimeRange } from '@grafana/data';
 import { SceneDataQuery } from '@grafana/scenes';
-import { useVariableValue, useVariableValues } from '@grafana/scenes-react';
+import { useVariableValue } from '@grafana/scenes-react';
 import { DataSourceRef } from '@grafana/schema';
 
 import { DATASOURCE_UID, VARIABLES } from '../constants';
@@ -44,11 +44,6 @@ export function convertTimeRangeToDomain(timeRange: TimeRange): Domain {
  * This hook will create a Prometheus label matcher string from the "groupBy" and "filters" variables
  */
 export function useQueryFilter(): string {
-  const [groupBy = []] = useVariableValues<string>(VARIABLES.groupBy);
   const [filters = ''] = useVariableValue<string>(VARIABLES.filters);
-
-  const groupByFilter = stringifyGroupFilter(groupBy);
-  const queryFilter = [groupByFilter, filters].filter((s) => Boolean(s)).join(',');
-
-  return queryFilter;
+  return filters;
 }
diff --git a/public/app/features/alerting/unified/triage/types.ts b/public/app/features/alerting/unified/triage/types.ts
index b599f46cb33..c878f8f303c 100644
--- a/public/app/features/alerting/unified/triage/types.ts
+++ b/public/app/features/alerting/unified/triage/types.ts
@@ -18,7 +18,10 @@ export interface GenericGroupedRow {
   type: 'group';
   metadata: {
     label: string;
-    value: string;
+    value: LabelValue;
   };
   rows: WorkbenchRow[];
 }
+
+export type LabelValue = string | typeof EmptyLabelValue;
+export const EmptyLabelValue = Symbol('empty label value');