From 1852ad78a20fd8b37f03c97c3dfb006790ce8d45 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Wed, 15 Jun 2022 12:51:13 +0200
Subject: [PATCH] Clean up tracked pointers when the event target has changed

---
 src/ol/interaction/Pointer.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/ol/interaction/Pointer.js b/src/ol/interaction/Pointer.js
index 51d268e144..83ff187f35 100644
--- a/src/ol/interaction/Pointer.js
+++ b/src/ol/interaction/Pointer.js
@@ -195,6 +195,16 @@ class PointerInteraction extends Interaction {
       const id = event.pointerId.toString();
       if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {
         delete this.trackedPointers_[id];
+        for (const pointerId in this.trackedPointers_) {
+          if (this.trackedPointers_[pointerId].target !== event.target) {
+            // Some platforms assign a new pointerId when the target changes.
+            // If this happens, delete one tracked pointer. If there is more
+            // than one tracked pointer for the old target, it will be cleared
+            // by subsequent POINTERUP events from other pointers.
+            delete this.trackedPointers_[pointerId];
+            break;
+          }
+        }
       } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERDOWN) {
         this.trackedPointers_[id] = event;
       } else if (id in this.trackedPointers_) {