diff --git a/website/src/heatmap/loader.js b/website/src/heatmap/loader.js
index 29380aab1..a95505749 100644
--- a/website/src/heatmap/loader.js
+++ b/website/src/heatmap/loader.js
@@ -28,6 +28,7 @@ export function createHeatmapLoader({ addDateToGrid, rebuildGrid, paint }) {
       return pointsByDate.get(date);
     },
     reset() {
+      abortController?.abort();
       pointsByDate = new Map();
     },
     /**