Don't dispatch orphaned touch events

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/core/GestureHandler.kt

@@ -477,10 +477,15 @@ open class GestureHandler {
   }
 
   private fun dispatchTouchUpEvent(event: MotionEvent, sourceEvent: MotionEvent) {
+    val pointerId = event.getPointerId(event.actionIndex)
+
+    if (trackedPointers[pointerId] == null) {
+      return
+    }
+
     extractAllPointersData()
     changedTouchesPayload = null
     touchEventType = RNGestureHandlerTouchEvent.EVENT_TOUCH_UP
-    val pointerId = event.getPointerId(event.actionIndex)
     val offsetX = sourceEvent.rawX - sourceEvent.x
     val offsetY = sourceEvent.rawY - sourceEvent.y
 

packages/react-native-gesture-handler/apple/RNGestureHandlerPointerTracker.mm

@@ -94,7 +94,7 @@
 {
   int registeredTouches = [self registeredTouchesCount];
 
   NSDictionary *data[registeredTouches];
   int nextIndex = 0;
 
   for (int i = 0; i < MAX_POINTERS_COUNT; i++) {
@@ -115,19 +115,26 @@
 
   _eventType = RNGHTouchEventTypePointerDown;
 
   NSDictionary *data[touches.count];
+  int changedCount = 0;
 
   for (int i = 0; i < [touches count]; i++) {
     RNGHUITouch *touch = [[touches allObjects] objectAtIndex:i];
     int index = [self registerTouch:touch];
-    if (index >= 0) {
-      _trackedPointersCount++;
+
+    if (index < 0) {
+      continue;
     }
 
-    data[i] = [self extractPointerData:index forTouch:touch];
+    _trackedPointersCount++;
+    data[changedCount++] = [self extractPointerData:index forTouch:touch];
+  }
+
+  if (changedCount == 0) {
+    return;
   }
 
-  _changedPointersData = [[NSArray alloc] initWithObjects:data count:[touches count]];
+  _changedPointersData = [[NSArray alloc] initWithObjects:data count:changedCount];
   // extract all touches last to include the ones that were just added
   [self extractAllTouches];
   [self sendEvent];
@@ -141,15 +148,25 @@
 
   _eventType = RNGHTouchEventTypePointerMove;
 
   NSDictionary *data[touches.count];
+  int changedCount = 0;
 
   for (int i = 0; i < [touches count]; i++) {
     RNGHUITouch *touch = [[touches allObjects] objectAtIndex:i];
     int index = [self findTouchIndex:touch];
-    data[i] = [self extractPointerData:index forTouch:touch];
+
+    if (index < 0) {
+      continue;
+    }
+
+    data[changedCount++] = [self extractPointerData:index forTouch:touch];
   }
 
-  _changedPointersData = [[NSArray alloc] initWithObjects:data count:[touches count]];
+  if (changedCount == 0) {
+    return;
+  }
+
+  _changedPointersData = [[NSArray alloc] initWithObjects:data count:changedCount];
   [self extractAllTouches];
   [self sendEvent];
 }
@@ -165,19 +182,26 @@
 
   _eventType = RNGHTouchEventTypePointerUp;
 
   NSDictionary *data[touches.count];
+  int changedCount = 0;
 
   for (int i = 0; i < [touches count]; i++) {
     RNGHUITouch *touch = [[touches allObjects] objectAtIndex:i];
     int index = [self unregisterTouch:touch];
-    if (index >= 0) {
-      _trackedPointersCount--;
+
+    if (index < 0) {
+      continue;
     }
 
-    data[i] = [self extractPointerData:index forTouch:touch];
+    _trackedPointersCount--;
+    data[changedCount++] = [self extractPointerData:index forTouch:touch];
+  }
+
+  if (changedCount == 0) {
+    return;
   }
 
-  _changedPointersData = [[NSArray alloc] initWithObjects:data count:[touches count]];
+  _changedPointersData = [[NSArray alloc] initWithObjects:data count:changedCount];
   [self sendEvent];
 }
 
@@ -218,7 +242,7 @@
 
   if (registeredTouches > 0) {
     int nextIndex = 0;
     NSDictionary *data[registeredTouches];
 
     for (int i = 0; i < MAX_POINTERS_COUNT; i++) {
       RNGHUITouch *touch = _trackedPointers[i];