From f100a4c68003300e99d7b6fa86c6f5196c41596f Mon Sep 17 00:00:00 2001
From: Leon Sorokin <leeoniya@gmail.com>
Date: Tue, 9 May 2023 16:24:13 -0500
Subject: [PATCH] Heatmap: Handle unsorted timestamps in calculate mode
 (#68111)

---
 public/app/features/transformers/calculateHeatmap/heatmap.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/public/app/features/transformers/calculateHeatmap/heatmap.ts b/public/app/features/transformers/calculateHeatmap/heatmap.ts
index 15677698baf..71864a375f1 100644
--- a/public/app/features/transformers/calculateHeatmap/heatmap.ts
+++ b/public/app/features/transformers/calculateHeatmap/heatmap.ts
@@ -15,6 +15,7 @@ import {
   durationToMilliseconds,
   parseDuration,
 } from '@grafana/data';
+import { isLikelyAscendingVector } from '@grafana/data/src/transformations/transformers/joinDataFrames';
 import {
   ScaleDistribution,
   HeatmapCellLayout,
@@ -325,7 +326,7 @@ export function calculateHeatmapFromData(frames: DataFrame[], options: HeatmapCa
   };
 
   const heat2d = heatmap(xs, ys, {
-    xSorted: true,
+    xSorted: isLikelyAscendingVector(xs),
     xTime: xField.type === FieldType.time,
     xMode: xBucketsCfg.mode,
     xSize: