From 5dadbcdcd54e4b658512c85d205cccf7e1e9128f Mon Sep 17 00:00:00 2001
From: David Luzar <luzar.david@gmail.com>
Date: Mon, 9 Mar 2020 17:17:26 +0100
Subject: [PATCH] don't set pointer on pointerMove if not already present
 (#889)

---
 src/components/App.tsx | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/components/App.tsx b/src/components/App.tsx
index ffa5997c..95ab228d 100644
--- a/src/components/App.tsx
+++ b/src/components/App.tsx
@@ -840,10 +840,12 @@ export class App extends React.Component<any, AppState> {
       this.canvas,
     );
     this.savePointer(pointerCoords);
-    gesture.pointers.set(event.pointerId, {
-      x: event.clientX,
-      y: event.clientY,
-    });
+    if (gesture.pointers.has(event.pointerId)) {
+      gesture.pointers.set(event.pointerId, {
+        x: event.clientX,
+        y: event.clientY,
+      });
+    }
 
     if (gesture.pointers.size === 2) {
       const center = getCenter(gesture.pointers);